Sollie's Midterm Multiple Choice

1.

1 point

Which of the following is true of a law and a theory?

A law describes observed events (Law of gravity) and a theory explains how events occur (theory of evolution)

A theory explains phenomenon (big bang theory) and a law mathematically explains how it is done.

Laws and theories are the same thing

A theory describes what is taking place and a law explains how it occurs.

2.

1 point

In outer space, a bowling ball and a ping-pong ball attract each other due to gravitational forces. How do the magnitudes of these attractive forces compare?

the bowling ball exerts a greater force on the ping-pong ball

the forces are zero because they cancel out

the ping-pong ball exerts a greater force on the bowling ball

there are actually no forces at all

the forces are equal

3.

1 point

Which of the Venn diagrams below best depicts the relationship between Biology, Chemistry, and Physics?
http://moodle.catholichigh.org/pluginfile.php/1297/question/questiontext/10250/12/15130/Venn%20Diagram.JPG

A

B

C

D

F

4.

1 point

A football is kicked at an angle θ with respect to the horizontal. Which one of the following statements best describes the acceleration of the football during this event if air resistance is neglected?

The magnitude of the acceleration is zero when the football has reached the highest point in its trajectory.

The acceleration is positive as the football rises, and it is negative as the football falls.

The magnitude of the acceleration is 0 m/s2 at all times.

The magnitude of the acceleration starts at 9.8 m/s2 and drops to some constant lower value as the ball approaches the ground.

The magnitude of the acceleration is 9.8 m/s2 at all times.

5.

1 point

A variable that can be manipulated in an experiment is

dependent variable

independent variable

none of these

responding variable

6.

1 point

The coefficient of kinetic friction is NOT

the slope of the line representing the change in the kinetic friction force and the normal force.

designated µk.

more than the coefficient of static friction.

equal to the quotient of the kinetic friction force and the normal force.

7.

1 point

Mu, µ, the coefficient of friction, whether static or kinetic is dependent upon

The force that pushes the surfaces together

The mass of the objects in contact

None of these. It depends on friction

The nature of both surfaces in contact

Only one of the surfaces during contact

8.

1 point

Which student used the most precise scale?
Student: A B C D
Mass (g): 50 49 49.06 49.2

C

D

A

B

9.

1 point

The following measurement was taken during a lab experiment - 45.06 seconds - Which of the digits is the uncertain digit?

4

6

0

5

10.

1 point

http://moodle.catholichigh.org/pluginfile.php/1297/question/questiontext/26699/3/20514/Block%20on%20incline.JPG
In an experiment with a block of wood on an inclined plane, with dimensions shown in the figure, the following observations are made:
(1) If the block is placed on the inclined plane, it remains there at rest.
(2) If the block is given a small push, it will accelerate toward the bottom of the incline without any further pushing.
Which is the best conclusion that can be drawn from these observations?

The coefficient of static friction is greater than 0.25 while the coefficient of kinetic friction is less than 0.25.

Both coefficients of friction must be less than 0.25.

The coefficient of kinetic friction must be negative

Both coefficients of friction must be greater than 0.25.

The coefficient of static friction must be less than the coefficient of kinetic friction.

11.

1 point

Which doesn't belong?

newton (N)

second (s)

kilogram (kg)

candela (cd)

meter (m)

12.

1 point

A skydiver pulls the chord of his parachute. The forces acting upon the skydiver and his parachute are shown in the diagram. From this diagram, one might infer that ____. Mark all that apply
http://moodle.catholichigh.org/pluginfile.php/1297/question/questiontext/26699/10/19754/parachutist.JPG

The skydiver will reach terminal velocity immediately.

The skydiver will continue to fall, but now will slow down.

The skydiver will immediately stop.

None of these will occur

The skydiver will have an acceleration that is directed upwards.

13.

1 point

On Earth, an object has a mass of 15.5 kg. What would the mass of the object be if it were sent to the planet formerly known as Pluto, some 3693 million miles from the sun, where the acceleration due to gravity is 0.06 times that of the Earth?

151.9 N

9.11 N

15.5 kg

151.9 kg

9.11 kg

14.

1 point

An object weighs 30 N on earth. A second object weighs 30 N on the moon. Which has the greater mass?
Select one:

not enough information to say

the one on the moon

the one on earth

they have the same mass

15.

1 point

http://moodle.catholichigh.org/pluginfile.php/1297/question/questiontext/29477/9/21750/mzf.gif
What about if the monkey were to drop as the zookeeper shot the banana? Should the zookeeper aim

Above the monkey

At the monkey

Below the monkey

16.

1 point

Physics is the science that examines the laws relating

matter and energy

forces and electricity

energy and forces

matter and space

17.

1 point

I. Born Christmas morning
II. Born same year Galileo died (1642)
III. Was a loner as a child
IV. Was a mathematics professor at Trinity College
V. Got into a fight with a boy ranked higher than him
Which of the above statements describes Newton’s early life?

None of these

I

I & II

II, IV, V

II only

All of these

18.

1 point

http://moodle.catholichigh.org/pluginfile.php/1297/question/questiontext/29477/7/21748/BULLET%20DROP.JPG
If the distance, L, was half as large, and the bullet had the same initial velocity, how would Δy, be affected?

It is not possible to determine unless numerical values are given for the distances.

It will be one fourth as large.

It will double.

It will be half as large.

It will be four times larger.

19.

1 point

The diagrams below depict the individual forces acting upon an object. Each arrow represents a force and the length of the arrow represents the size of the force. Based on this information, which objects could be moving to the right at a constant speed? Mark all that apply
http://moodle.catholichigh.org/pluginfile.php/1297/question/questiontext/24174/8/19755/Accleration%20blocks.jpg

B

D

C

E

A

20.

1 point

A 2.0-N rock slides on a frictionless inclined plane.Which one of the following statements is true concerning the normal force that the plane exerts on the rock?
http://moodle.catholichigh.org/pluginfile.php/1297/question/questiontext/26699/2/20511/Rock%20on%20incline.JPG

The normal force is 2.0 N.

The normal force increases as the angle of inclination, θ, is increased.

The normal force is zero newtons.

The normal force is greater than 2.0 N.

The normal force is less than 2.0 N, but greater than zero newtons.

21.

1 point

Which of the following measurements could have been taken with the same instrument?

23.907 m

92.3 m

124.56 m

0.981 m

120 m

22.

1 point

With one exception, each of the following units can be used to express mass. What is the exception?

newton

kilogram

gram

slug

23.

1 point

A sheet of paper can be withdrawn from under a container of milk without toppling it if the paper is jerked quickly. This best demonstrates that

the milk carton has no acceleration

none of these

gravity tends to hold the milk carton secure

the milk carton has inertia

there is an action-reaction pair of forces

24.

1 point

A book is at rest on a table top. Which of the following force(s) is(are) acting on the book?
I. A downward force due to gravity.
II. The upward force by the table.
III. A net downward force due to air pressure.
IV. A net upward force due to air pressure.
http://moodle.catholichigh.org/pluginfile.php/1297/question/questiontext/24174/4/19724/Book%20on%20table.JPG

I only.

I & II

I, II, & IV.

None of these, since the book is at rest there are no forces acting on it.

I, II, & III.

25.

1 point

A zookeeper devises a rubber band gun to shoot food to a monkey who is too shy to come down from the trees. If the monkey does not move, should the zookeeper aim?

The zookeeper would not be able to hit the monkey anyway.

At the monkey

Below the monkey

Above the monkey

26.

1 point

Which one of the following is an example of a vector quantity?

mass

velocity

distance

area

27.

1 point

A spring-loaded gun is aimed horizontally and is used to launch identical balls with different initial speeds. The gun is at a fixed position above the floor. The balls are fired one at a time. If the speed of the second projectile fired is twice the speed of the first projectile fired, how is the horizontal range affected?

The range for both projectiles will be the same.

The range of the second projectile will be twice as large as that of the first projectile.

The range of the second projectile is about 1.4 times larger than that of the first projectile.

The range of the second projectile will be smaller than that of the first projectile by a factor of 1.4.

The range of the second projectile will be half as much as that of the first projectile.

28.

1 point

After missing a layup, Johnny expresses his anger by hitting the wall. The reaction force to the force of Johnny's palm hitting the wall is ____.

the wall denting

the wall forcing Johnny's palm

the wall forcing itself

Johnny's palm forcing itself

Johnny never misses another layup

the loud sound that is produced

Johnny's palm stops

Johnny's palm forcing the wall

29.

1 point

The number one (1) rule in this class is

Sit during prayer.

Turn in your homework and place it anywhere you would like.

No talking at any time during the class.

Turn in your assignments in ink.

Never place your feet on the desk in front of you.

30.

1 point

A ball that is thrown upwards from the ground will eventually reach its highest point (the peak) and fall back to the ground. It takes 3.0 seconds for the ball to reach its highest point. How much time does it take the ball to fall from its peak to the ground? Assume a free fall motion.

6.0 seconds

9.8 seconds

1.5 seconds

3.0 seconds

31.

1 point

A useful method of expressing very small or very large numbers is

Arabic numerals

Roman numerals

the metric system

scientific notation

32.

1 point

Compared to a 1 kg block of solid iron, a 2 kg block of solid iron has twice as much

Density

Inertia

Volume

all of these

none of these

33.

1 point

Which of the following is a rule for significant figures?

Digits other than zero are never significant

The left-most significant figure is uncertain

Zeros between two other significant figures are significant

No final zero or zeros after the decimal point are significant

34.

1 point

A tennis ball is thrown upward at an angle from point A. If follows a trajectory and hits the ground at point D. At the instant shown, the ball is at point B. Point C represents the highest position of the ball above the ground.
How do the x and y components of the velocity vector of the ball compare at the points B and C?
http://moodle.catholichigh.org/pluginfile.php/1297/question/questiontext/29477/12/21760/Tennis%20ball%20trajectory.jpg

The x components are the same; the y component has a larger magnitude at C than at B.

The x component is larger at C than at B; the y component at B points up while at C, it points downward.

The x component is larger at B than at C; the y component at B points down while at C, it points upward.

The velocity components are non-zero at B and zero at C

The x components are the same; the y component at C is 0 m/s.

35.

1 point

A rocket moves through empty space in a straight line with constant speed. It is far from the gravitational effect of any star or planet. Under these conditions, the force that must be applied to the rocket in order to sustain its motion is

equal to its weight.

dependent on how fast it is moving.

zero.

equal to its mass.

36.

1 point

At what angle should a water-gun be aimed in order for the water to land with the greatest horizontal range?

30 degrees

45 degrees

60 degrees

0 degrees

37.

0 points

Physics.

Yes

38.

1 point

The kilogram is a standard unit of

Mass

Distance

Energy

Time

39.

1 point

Two identical blocks are pulled along a rough surface as suggested in the figure. Which one of the following statements is false?
http://moodle.catholichigh.org/pluginfile.php/1297/question/questiontext/26699/7/20509/Identical%20blocks.JPG

A force of the same magnitude was required to start each block moving.

A force of the same magnitude is needed to keep each block moving.

The normal force exerted on the blocks by the surface is the same for both blocks.

The magnitude of the force of kinetic friction is greater for the block on the right.

The coefficient of kinetic friction is the same in each case.

40.

1 point

The static friction force is

the force need to keep an object moving at a constant velocity across a surface.

the minimum force required to overcome static friction and move an object.

the force needed to bring an object to rest.

equal to the net force.

41.

1 point

http://moodle.catholichigh.org/pluginfile.php/1297/question/questiontext/29477/8/21749/Trucks%20off%20table.JPG
Two toy trucks roll off the side of a table. The heights, the speeds, and the masses of the trucks are given.
Which truck, A or B will be in the air the longest amount of time?

B

A

42.

1 point

A bird is able to fly due to the marvels of Newton's third law.
Identify the two (2) forces corresponding to the action-reaction FORCE pairs that are responsible for the bird’s flight. List the two forces.

The bird's weight is reduced as it flaps its wings.

Air moves out of the way of the bird making it easier to move forward.

The bird's wings push downward upon the air.

The force of gravity pulls the bird downward.

The air pushes upward on the bird’s wings.

The bird's wings move upward after every downward stroke.

Air is compressed and a partial vacuum is created above the bird.

43.

1 point

What is 53 192.674 38 written in three significant figures?

53 193

53 192.674

53 192.7

50 000

53 200

44.

1 point

A baseball is hit upward and travels along a parabolic arc before it strikes the ground. Which one of the following statements is necessarily true?

The velocity of the ball is a maximum when the ball is at the highest point in the arc.

The acceleration of the ball is 0 m/s2 when the ball is at the highest point in the arc.

The x-component of the velocity of the ball is the same throughout the ball's flight.

The velocity of the ball is zero when the ball is at the highest point in the arc.

The acceleration of the ball decreases as the ball moves upward.

45.

1 point

The coefficient of kinetic friction is NOT

designated µk.

equal to the quotient of the kinetic friction force and the normal force.

more than the coefficient of static friction.

the slope of the line representing the change in the kinetic friction force and the normal force.

46.

1 point

Action and reaction forces always occur in equal and opposite pairs. They do not balance each other because the ____.

action and reaction forces act on different objects

action and reaction forces act in the same direction

... nonsense! They do balance each other since they are equal and opposite.

reaction force acts for a longer time than the action force

action force acts for a longer time than the reaction force

reaction force acts only after the action force is removed

47.

1 point

Starting from rest, a particle confined to move along a straight line is accelerated at a rate of 5.0 m/s2. Which one of the following statements accurately describes the motion of this particle as it relates to acceleration?

The speed of the particle increases by 5.0 m/s during each second.

The acceleration of the particle increases by 5.0 m/s2 during each second.

The particle travels 5.0 m only during the first second.

The particle travels 5.0 m during each second.

48.

1 point

A 2.0-N force acts horizontally on a 10-N block that is initially at rest on a horizontal surface. The coefficient of static friction between the block and the surface is 0.50. What is the magnitude of the frictional force that acts on the block?

2 N

10 N

8 N

0 N

5 N

49.

1 point

A bullet is fired horizontally, and at the same instant a second bullet is dropped from the same height. Ignore air resistance. Compare the times of fall of the two bullets.

The dropped bullet hits first.

They hit at the same time.

The fired bullet hits first.

Cannot tell without knowing the masses

50.

1 point

An astronaut on Earth kicks a bowling ball and hurts his foot. A year later, the same astronaut kicks a bowling ball on the Moon with the same force. His foot hurts the same because

The mass of the bowling ball got smaller on the moon

The inertia of the bowling ball didn’t change

The gravity on the moon is larger

There is no gravity on the moon

The gravity on the Earth is smaller