Year 10 Physics

1.

1 point

To calculate the average speed:

use distance divide by time

use speed divide by time

use displacement divide by time

use velocity divide by time

2.

1 point

To calculate average velocity

use velocity divide by time

use speed divide by time

use distance divide by time

use displacement divide by time

3.

1 point

A car manufacturer wants to produce cars that accelerate faster. Which changes in their cars would result in greater acceleration?

Increase both the forward force by the engine and the mass of the car.

Decrease both the forward force and the mass of the car.

Decrease the forward force and increase the mass of the car.

Increase the forward force and decrease the mass of the car.

4.

1 point

A student walks a distance of 1.2 km to school in a time of 15 minutes. Which of the following statements are certain to be correct?

Her average velocity is 4.8 km/h.

Her instantaneous speed is 4.8 km/h.

Her instantaneous velocity is 4.8 km/h.

Her average speed is 4.8 km/h.

5.

1 point

The difference between velocity and speed is

velocity only has a direction and speed has a direction and size

speed uses displacement and velocity uses distance

velocity is a scalar and velocity is a vector

velocity is a vector and speed is a scalar

6.

1 point

The average speed of an aeroplane that travels from Perth to Melbourne, a distance of 2730 km by air, in 3 hours is?

8190

910 km/hr

3

2739 km/hr

7.

1 point

In the formula F=ma. The units of the mass must be in

kg

mass

g

weight

8.

1 point

A car travelling at 60 km/h increases its speed to 100 km/h in 8 seconds. Its average acceleration is:

5 km/h/s

40 km/h/s

8 km/h/s

60 km/h/s

9.

1 point

The average acceleration of a drag-racing car that reaches a speed of 506 km/h in 4.6 seconds is:

506 km/h/s

110 km/h/s

510.6 km/h/s

4.6 km/h/s

10.

1 point

A class is studying Newton’s three laws.
The teacher asks a student wearing rollerblades to face the wall and push against it. The student moves backwards away from the wall. Which is the best explanation for her movement?

Her action of pushing resulted in a reaction force by the wall, in the opposite direction to her push.

The inertia of the student is responsible for her acceleration.

The push is a force and causes her to accelerate.

She used her feet to push herself away from the wall.

11.

1 point

The time for a turtle to cross a 6 m track if it travels 3 m/hr is?

1hr

2hrs

18hrs

3hrs

12.

1 point

Velocity is a measure of the rate:

at which distance is covered.

of change in acceleration.

at which speed increases.

of change in position.

13.

1 point

If the mass of a car is 200 kg and it is accelerating at 3m/s^2. The force is:

3 N

600 N

200 N

66.7 N

14.

1 point

Select the correct answer about a rocket engine.

A rocket takes off because the reaction force of the ground on the rocket overcomes the weight of the rocket.

Rocket engines are identical to jet engines in aircraft.

The exhaust gases produce a thrust that pushes the rocket upwards.

The oxygen used to burn the rocket fuel comes from the atmosphere.

15.

1 point

A car is driven along a highway at an average speed of 90 km/h for 2 hours without a rest stop. What distance has it covered?

360 km

Not enough information is given to calculate

45 km

180 km

16.

1 point

An list of examples of forces are

thrust, friction, weight velocity

thrust, friction, weight, acceleration

thrust, friction, normal force, weight

thrust, friction, weight, speed

17.

1 point

Why does an object fall?

It just falls

Invisible ninjas are pulling it down

The force of gravity pulls it down

18.

1 point

A ticker timer is used in the laboratory to investigate motion. The time interval between five dots on the ticker tape is:

0.01 seconds

0.02 seconds

0.1 seconds

0.2 seconds

19.

1 point

Which law is expressed as follows?

‘The size of an object’s acceleration depends directly on the size of the net unbalanced force acting on it and is inversely proportional to its mass.’

Newton's third law

Newton's first law

Galileo's law of inertia

Newton's second law

20.

1 point

A loaded semi-trailer travels from Melbourne to Bendigo, a distance of 150 km, in 3 hours. It unloads and returns to Melbourne in 2 hours. Without including the time taken to unload, the average speed for the whole journey is:

50 km/h

zero

62.5 km/h

60 km/h

21.

1 point

Acceleration is best described as the rate of change in:

speed

energy transfer

position

net force

22.

1 point

If a snail travels at a speed of 3 km/hr for 3 hours. How far does it travel?

9000 km

9 km

1 km

6 km

23.

1 point

If the force of an object is 100N and the mass of the object is 50 kg. What is the acceleration of the object?

2 m/s

50 m/s

100 m/s

5000 m/s

24.

1 point

Inertia is a:

force that changes motion.

tendency to change motion.

tendency to resist motion

force that resists motion.

25.

1 point

To calculate acceleration

use displacement divide by time

use speed divide by time

use velocity divide by time

use distance divide by time