Science, Ch.13

1.

1 point

To find the average speed of an object you must divide ___________by time.

direction

distance

power

speed

2.

1 point

If you held a medium sized apple in your hand it would exert a downward force of about ______newton(s)

4

1

2

3

3.

1 point

Calculate the power in watts used if you exert 500 joules of work in 50 seconds.

250 W

100 W

55 W

45 W

4.

1 point

_______is the rate in which work is done.

speed

force

rate

power

5.

1 point

Work divided by Time is a formula used to find the ____________

Speed

Power

Work

6.

1 point

Force x Distance = ______________

Power

Watt

Work

7.

1 point

A pendulum would be an example of _________Motion

circular

periodic

variable

vibrational

8.

1 point

Acceleration is the rate at which velocity changes. True or False?

True

False

9.

1 point

Velocity of an object will give you the _________ and ________

mass and speed

speed and direction

force and power

watts and joules

10.

1 point

An object resists a change in motion because of _____________

inertia

gravity

motion

friction

11.

1 point

If you and I were trying to push a box across the floor in the same direction. I push with 27 Newtons, You push with 18 Newtons. What is our Net force?

7 Newtons

45 Newtons

9 Newtons

12.

1 point

When you raise or lower a flag on a flagpole, you are using a simple machine called a _________

lever

pulley

wheel and axle

inclined plane

13.

1 point

Newton has ____ laws of motion.

1

2

3

4

14.

1 point

True or False. A Magnet is strongest at the poles.

True

False

15.

1 point

When you raise or lower a flag on a flagpole, you are using a simple machine called a _________

lever

pulley

wheel and axle

inclined plane

16.

1 point

An object is in a state of _____________when all the forces are balanced.

friction

equilibrium

newtons

17.

1 point

A ______ is a device that makes work easier to do.

fulcrum

inertia

machine

force

18.

1 point

Satellites stay in orbit because of .......

luck

thrust from the satellite

the earth's gravity

the sun's gravity

19.

1 point

Gravity is a ______ that pulls everything towards the middle of the earth.

velocity

speed

gravity

force

20.

1 point

Every object in the universe exerts a gravitational pull on every other object. But only the gravity of a large object such as earth is strong enough to be felt.
True or False.

True

False

21.

1 point

In our book it talks about different kinds of motion. How many did they talk about? Make sure you add the two we talked about today.

4

2

3

5

22.

1 point

How do electricity and magnetism act on different objects?

They can only pull objects

They can either push or pull objects

They can only push objects

23.

1 point

If you threw a ball in space and on earth. The ball being thrown in space will not slow down as fast because their is less _________ than on earth.

gravity

friction