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Grade9 second week

Total questions: 34

Worksheet time: 23mins

Name
Class
Date
1.

Write the scientific term:

A method used by physicists to predict the mathematical relation between physical

quantities

(a)  

2.

A bus starts from rest and reaches 20 m/s in 5 seconds. Its acceleration is ………

a)

2 m/s²

b)

4 m/s²

c)

5 m/s²

d)

10 m/s²

3.

Two cars move towards each other. One with speed 40 km/h and the other with 60 km/h. Their relative speed is ………

a)

20 km/h

b)

40 km/h

c)

60 km/h

d)

100 km/h

4.

A body covers 100 m in the 1st 10 seconds, and 200 m in the next 10 seconds. Its motion is ………

a)

Uniform

b)

Non-uniform

c)

Constant

d)

Relative

5.

A car increases its velocity from 20 m/s to 40 m/s in 10 seconds. What is its acceleration?

a)

1 m/s²

b)

2 m/s²

c)

3 m/s²

d)

4 m/s²

6.

Which quantity describes rate of change of velocity?

a)

Speed

b)

Acceleration

c)

Force

d)

Distance

7.

If acceleration = 0, motion is ………

a)

Uniform

b)

Accelerated

c)

Decelerated

d)

Vibratory

8.

If speed is constant, acceleration is ………

a)

Positive

b)

Negative

c)

Zero

d)

Infinite

9.

Speed measures how fast a body ………

a)

Changes velocity

b)

Moves

c)

Accelerates

d)

Stops

10.

Acceleration measures how fast ………

a)

Speed changes

b)

Distance changes

c)

Time changes

d)

Mass changes

11.

If a runner covers 100 m in 12 s, his average speed = ………

a)

8 m/s

b)

8.3 m/s

c)

9 m/s

d)

12 m/s

12.

A car moves 300 m in 20 s and 200 m in next 10 s. Average speed = ………

a)

15 m/s

b)

20 m/s

c)

60 km/hr

d)

16.7km/hr

13.

A car travels 120 km in 2 h and 60 km in 1 h. Average speed = ………

a)

40 km/h

b)

50 km/h

c)

60 km/h

d)

70 km/h

14.

Two cars move in opposite directions at 30 km/h and 40 km/h. Their relative speed is ………

a)

10 km/h

b)

30 km/h

c)

40 km/h

d)

70 km/h

15.

A curved line in distance-time graph shows ………

a)

Uniform speed

b)

Accelerated motion

c)

Body at rest

d)

Constant speed

16.

A straight horizontal line on speed -time graph means ………

a)

Body is at rest

b)

Body has constant speed

c)

Body is accelerating

d)

Body is decelerating

17.

Which graph represents uniform motion?

a)

Straight line distance-time

b)

Curved distance-time

c)

Zigzag line

d)

Vertical line

18.

If velocity is constant, acceleration is ………

a)

Positive

b)

Negative

c)

Zero

d)

Infinite

19.

A car increases its velocity from 0 to 20 m/s in 10 s. Its acceleration is ………

a)

1 m/s²

b)

2 m/s²

c)

4 m/s²

d)

5 m/s²

20.

Acceleration = change in ……… ÷ time

a)

Distance

b)

Speed

c)

Force

d)

Mass

21.

Which of the following is a non-uniform motion?

a)

Train moving at 60 km/h constantly

b)

A car slowing down at traffic lights

c)

Earth revolving around Sun

d)

A person walking 5 km/h

22.

A horizontal line in a distance-time graph means ………

a)

The body is moving

b)

The body is at rest

c)

The body is accelerating

d)

The speed is changing

23.

Distance-time graph helps us to find ………

a)

Acceleration

b)

Force

c)

Speed

d)

Mass

24.

If a car covers 200 km in 4 hours, its average speed is ………

a)

25 km/h

b)

40 km/h

c)

50 km/h

d)

80 km/h

25.

Motion is described by ………

a)

Force and mass

b)

Distance and time

c)

Weight and energy

d)

Speed and acceleration

26.

Two cars move in opposite direction with the speed 100 km per hour for each so the speed of the second car as estimated by the driver of the first car equal zero

a)

True

b)

False

27.

An observer in a moving car with 80 km/h was observing a moving car with 90 km/h in the same direction, so the observed speed of the second car is ................. km/h.

a)

10

b)

170

28.

Complete :

(a)   is the change of an object position as time passes according to the position of another fixed object .

29.

Complete :

(a)   is the speed of a moving object relative to a constant or a moving observer .

30.

It is the speed by which the object moves when it covers equal distances at equal periods of time

a)

Irregular (non-uniform)

b)

Positive uniform acceleration

c)

Regular (uniform) speed

d)

Motion

31.

Physicists use other mathematical relations like graphs and tables in order to :

a)

Predict the relation between certain physical quantities .

b)

Understand practical results.

c)

Describe the physical phenomena in an easier way.

d)

All the previous

32.

It is the rate of change of speed.

a)

Acceleration

b)

Average speed

c)

Relative speed

d)

Scalar Physical quantity

33.

It is the speed of a moving object relative to a constant or a moving observer

(a)  

34.

It is the regular speed by which the object moves to cover the same distance at the same period of time.

(a)