Chapter 8 – Motion – Ankit Enterprises

Who gave the equations of motion for the first time?

(a) Bernhard Nobel
(b) Issac Newton
(c) C. V. Raman
(d) Einstein

The displacement of the object in a unit time is called:

(a) speed
(b) velocity
(c) acceleration
(d) average speed

The rate of change of velocity per second is known as:

(a) acceleration
(b) speed
(c) average velocity
(d) linear motion

If the velocity of an object changes from an initial value u to the final value v in time t, the acceleration a will be:

(a) a = \(\frac{v-u}{t}\)
(b) a = \(\frac{v+u}{t}\)
(c) a = \(\frac{t}{v-u}\)
(d) a = \(\frac{t}{v+u}\)

What is the unit of acceleration?

(a) m/s
(b) m/s2
(c) ms
(d) m/s3

The unit of speed and velocity both is:

(a) ms-1
(b) ms-2
(c) ms2
(d) ms

A particle is moving in a circular path of radius r. The displacement after half a circle would be:

(a) zero
(b) πr
(c) 2r
(d) 2πr

A body is thrown vertically upward with velocity u, the greatest height h to which it will rise is:

(a) u/g
(b) u2/2g
(c) u2/g
(d) u/2g

The slope of a velocity-time graph gives:

(a) the distance
(b) the displacement
(c) the acceleration
(d) the speed

If the displacement of an object is proportional to the square of time, then the object moves with:

(a) uniform velocity
(b) uniform acceleration
(c) increasing acceleration
(d) decreasing acceleration

If the displacement of an object is proportional to square of time, then the object moves with:

(a) Uniform velocity
(b) Uniform acceleration
(c) Increasing acceleration
(d) Decreasing acceleration

From the given v-t graph, it can be inferred that the object is

(a) At rest
(b) In uniform motion
(c) Moving with uniform acceleration
(d) In non-uniform motion

Suppose a boy is enjoying a ride on a marry-go-round which is moving with a constant speed of 10 m/s. It implies that the boy is:

(a) At rest
(b) Moving with no acceleration
(c) In accelerated motion
(d) Moving with uniform velocity

A particle is moving in a circular path of radius r.

(a) Zero
(b) πr
(c) 2r
(d) 2πr

Which of the following can sometimes be ‘zero’ for a moving body?

(a) Only (i)
(b) (i) and (ii)
(c) (i) and (iv)
(d) Only (iv)

Which of the following statement is correct regarding velocity and speed of a moving body?

(a) Velocity of a moving body is always higher than its speed
(b) Speed of a moving body is always higher than its velocity
(c) Speed of a moving body is its velocity in a given direction
(d) Velocity of a moving body is its speed in a given direction

When a car driver travelling at a speed of 10 m/s applies brakes and brings the car to rest in 20 s, then the retardation will be:

(a) + 2 m/s2
(b) − 2 m/s2
(c) − 0.5 m/s2
(d) + 0.5 m/s2

The speed – time graph of a car is given here. Using the data in the graph calculate the total distance covered by the car.

(a) 1250 m
(b) 875 m
(c) 1500 m
(d) 870 m

A car of mass 1000 kg is moving with a velocity of 10 m/s. If the velocity-time graph for this car is a horizontal line parallel to the time axis, then the velocity of the car at the end of 25 s will be:

(a) 40 m/s
(b) 25 m/s
(c) 10 m/s
(d) 250 m/s

Which of the following is most likely not a case of uniform circular motion?

(a) Motion of the earth around the sun
(b) Motion of a toy train on a circular track
(c) Motion of a racing car on a circular track
(d) Motion of hours’ hand on the dial of a clock

In which of the following cases of motions, the distance moved and the magnitude of the displacement are equal?
i. If the car is moving on a straight road
ii. If the car is moving in circular path
iii. The pendulum is moving to and fro
iv. The earth is moving around the sun

(a) only(ii)
(b) (i) and (iii)
(c) (ii) and (iv)
(d) only (i)

A car is travelling at a speed of 90 km/h. Brakes are applied so as to produce a uniform acceleration of – 0.5 m/s2. Find how far the car will go before it is brought to rest?

(a) 8100 m
(b) 900 m
(c) 625 m
(d) 620 m

In a free fall the velocity of a stone is increasing equally ion equal intervals of time under the effect of gravitational force of the earth. Then what can you say about the motion of this stone? Whether the stone is having:

(a) Uniform acceleration
(b) Non-uniform acceleration
(c) Retardation
(d) Constant speed

The numerical ratio of displacement to distance for a moving object is:

(a) Always less than 1
(b) Equal to 1 or less than 1
(c) Always more than 1
(d) Equal to 1 or more than one

Four cars A, B, C and D are moving on a levelled, straight road. Their distance time graphs are shown in the figure below. Which of the following is the correct statement regarding the motion of these cars?

(a) Car A is faster than car D
(b) Car B is the slowest
(c) Car D is faster than car C
(d) Car C is the slowest

Fill in the blank

Newton’s law is based on the concept of inertia.

Fill in the blank

Negative acceleration is known as

Fill in the blank

If the path of a moving object is a straight line then, such a motion is known as a

Fill in the blank

and laid down the scientific foundation of concept of motion.

Fill in the blank

Velocity is quantity.

Chapter 8 – Motion

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