Free Printable Physics Unit 1 Test

Worksheets

Physics Unit 1 Test

Total questions: 40

Worksheet time: 44mins

Name

Class

Date

Force is measured according to which law of motion

1^st

3^rd

2^nd

All

Range of a projectile on a horizontal plane is same for the following pair of angles:

15° and 18°

43° and 47°

20° and 80°

52° and 62°

A body moves from point P (3, 4) to Q (5, 7). Its displacement vector would be

$8iˆ+10ˆj$

$8iˆ+2ˆj$

$2iˆ-2ˆj$

$2iˆ+3ˆj$

How is the motion of a body affected by balanced and unbalanced forces acting on it?

A force of 10 N acts on a body of mass 1 kg for 5 sec to a distance of 10 m. The rate of change of momentum is:

50 N

25 N

20 N

10 N

The displacement after half a circle of radius “r” would be

πr

Zero

non-uniform motion

A baseball is thrown vertically into the air. The acceleration of the ball at its highest point is

2g, down

g, up

Zero

g, down

At what angle of projection, horizontal and vertical component of velocities have same values?

30^o

45^o

60^o

90^o

Accelerating frame of reference which has constant acceleration is

Constant moving car

Moving train

Free falling body on earth

None of these

10.

A body of mass M collides against a wall with a velocity v and retraces its path with the same speed. The change in momentum is (take the initial direction of the velocity as positive)

2Mv

–2Mv

Zero

11.

A car is travelling at an average speed of 25m/s then time taken by train to travel 1200m is (in seconds)

40 seconds

38 seconds

48 seconds

58 seconds

12.

The slope of v-t graph for uniform velocity is

Positive

Negative

Positive or negative

13.

A particle moves from A to B and then it moves from B to C as shown in figure. Calculate the ratio between path length and displacement.

1/2

Infinity

14.

Which graph represents the zero acceleration

15.

A body is projected from a point with different angles of projections 20°, 35°, 45°, 60° with the horizontal but with same initial speed. Their respective horizontal ranges are R₁, R₂, R₃ and R₄. Identify the correct order in which the horizontal ranges are arranged in increasing order

R₁, R₂, R₄, R₃

R₁, R₄, R₂, R₃

R₂, R₁, R₄, R₃

R₄, R₁, R₂, R₃

16.

Which of the following is NOT an example of accelerated motion?

Vertical component of projectile motion

Circular motion at constant speed

A swinging pendulum

Horizontal component of projectile motion

17.

A fighter plane drops a bomb when it is at the top of enemies target. Bomb misses the target due to

Horizontal component of velocity

Vertical component of velocity

Action of gravity

Bad weather

18.

If R is the max range of projectile then greatest height attained is

R/2

R/4

19.

A truck weighing 2500 kg and moving with a velocity of 21 ms^-1 collides with stationary car weighing 1000 kg. The truck and the car move together after the impact. Calculate their common velocity.

15 ms^–1

5 ms^–1

10 ms^–1

20 ms^–1

20.

At the highest point, the velocity of projectile is

Maximum

Minimum

Zero

Equal to half of x–component of velocity

21.

The position of a particle moving along x-axis at certain times is given below:

Which of the following describes the motion correctly?

Uniform, accelerated

Uniform, decelerated

Non-uniform, accelerated

Non-uniform, decelerated

22.

The following is the motion of a particle along the x-axis. Which of the following statements describing the motion is false?

The particle is at rest at point A

The particle has zero acceleration between B and D

The particle is moving in the negative x-direction at point D.

The particle is moving uniformly in the positive x-direction at point B

23.

For a moving object what is true?

Its displacement can be zero

Distance and displacement both can be zero

Its distance can never be zero

Both “A” & “B”

24.

Which graph shows the variation of displacement of vertically thrown ball with time?

25.

Two bodies are dropped from different heights hi and hi. The ratio of the times taken by them to reach the ground will be?

$\left(\frac{h_1}{h_2}\right)^2$

$\left(\frac{h_1}{h_2}\right)^{ }$

$\sqrt[]{\left(\frac{h_1}{h_2}\right)^{ }}$

$\sqrt[]{\left(\frac{h_2}{h_1}\right)^{ }}$

26.

The velocity of a particle which is decelerating uniformly changes from 30 ms^-1 to 15 m s^-1 in 75 m. After what further distance will it come to rest?

25 m

37.5 m

50 m

75 m

27.

When we jump out of a boat standing in water, it moves:

Backward

Forward

Sideways

None of these

28.

Newton's laws do not hold good for particles?

At rest

Moving slowly

High velocity

Moving with velocity comparable to velocity of light

29.

Which of the following displacement-time graphs represent uniform motion?

30.

What is true about action-reaction pair?

They cancel out each other

They have same magnitude but opposite direction

Never cancel as they act on different objects

Both “B” & “C”

31.

The speed of a particle at the end of four successive seconds is 20, 25,30 and 35 km h^-1. The acceleration of the particle is:

5 km h^-2

5 km h s^-1

5 km s^-2

5 km h^-1 s^-1

32.

When collision between the bodies in a system is inelastic in nature then for system?

Momentum changes but K.E remain conserve

K.E changes but momentum remain conserve

Both momentum and K.E change

Both momentum and K.E remain conserve

33.

If R = 4 $\sqrt[]{3}$ H, where “R” is range of projectile and “H” is height of projectile, the angle of projection is:

30°

60°

45°

70°

34.

The horizontal range of a projectile is:

35.

A heavy steel ball of mass greater than 1 kg moving with a speed of 2 ms^-1collides head on with a stationary ping-pong bail of mass less than 0.1 g. The collision is elastic. After the collision the ping-pong ball moves approximately with speed:

2ms^-1

4ms^-1

2 x 10⁴ ms^-1

2 x 10³ W

36.

A particle of mass m is projected to the right on a smooth surface with a velocity v at an identical particle which is originally stationary. Upon the collision which is elastic, what happens to the motion of the second particle?

The second particle will move to the right with a speed greater than v.

The second particle will move to the right with a speed smaller than v.

The second particle will move to the right with a speed equal to v.

The two particles will move together to the right with a speed equal to $\frac{v}{2}$

37.

N s is the unit of:

Work

Angular momentum

Power

Linear momentum

38.

Galileo writes that for angles of projection of a projectile (45° + θ) and (45° θ) the

horizontal ranges described by the projectile are in the ratio of:

2:1

(45°+ θ):(45°-θ)

1:2

1:1

39.

Two balls projected at 30° and 60° with same initial velocities. The ratio of their maximum heights is:

1:2

3:4

1:3

2:3

40.

Two balls projected at 30° and 60° with same initial velocities. The ratio of their maximum heights is:

is always perpendicular to acceleration

Is perpendicular to acceleration for half journey only

Is never perpendicular to acceleration

Is perpendicular to acceleration at one instant only

100 %

Physics Unit 1 Test

Total questions: 40

Worksheet time: 44mins

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