# MCQ Questions for Class 9 Science Chapter 8 Motion

Solving the Motion Multiple Choice Questions of Class 9 Science Chapter 8 MCQ can be of extreme help as you will be aware of all the concepts. These MCQ Questions on Motion Class 9 with answers pave for a quick revision of the Chapter thereby helping you to enhance subject knowledge. Have a glance at the MCQ of Chapter 8 Science Class 9 and cross-check your answers during preparation.

Multiple Choice Questions

Question 1.
Who gave the equations of motion for the first time?
(a) Bernhard Nobel
(b) Issac Newton
(c) C. V. Raman
(d) Einstein

Acceleration Calculator computes the rate of change of an object speed easily. It takes time, velocity as input & generates acceleration as output quickly.

Question 2.
The displacement of the object in a unit time is called:
(a) speed
(b) velocity
(c) acceleration
(d) average speed

Question 3.
The rate of change of velocity per second is known as:
(a) acceleration
(b) speed
(c) average velocity
(d) linear motion

Question 4.
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 = $$\frac{t}{v+u}$$

Answer: (a) a = $$\frac{v-u}{t}$$

Question 5.
What is the unit of acceleration?
(a) m/s
(b) m/s2
(c) ms
(d) m/s3

Question 6.
The unit of speed and velocity both is:
(a) ms-1
(b) ms-2
(c) ms2
(d) ms

Question 7.
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

Question 8.
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

Question 9.
The slope of a velocity-time graph gives:
(a) the distance
(b) the displacement
(c) the acceleration
(d) the speed

Question 10.
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

Fill in the Blanks.

Question 11.
Newton’s ________ law is based on the concept of inertia.

Question 12.
Negative acceleration is known as __________

Question 13.
If the path of a moving object is a straight line then, such a motion is known as a _________

Question 14.
_______ and ______ laid down the scientific foundation of concept of motion.

Question 15.
Velocity is _______ quantity.

Question 16.
During the uniform motion of an object along a straight line, the velocity remains _______ with time.

Question 17.
The initial velocity of an object moving from the position of rest is _________

Question 18.
The displacement of the object in a unit time is called __________

True/False.

Question 19.
Acceleration is a measure of the change in the velocity of an object per unit of time.

Question 20.
The acceleration of an object is indirectly proportional to the net applied force.

Question 21.
Motion is a change of position, it can be described in terms of the distance moved or the displacement.

Question 22.
The simplest type of motion is the motion along a straight line.

Question 23.
Automobiles are fitted with a device that shows the distance travelled. Such a device is known as an odometer.

Match the Column.

Question 24.

 A B 1. C.G.S. unit of acceleration (i) Distance 2. Motion of a pendulum (ii) cm/s2 3. Scalar quantity (iii) Simple harmonic motion 4. Momentum (iv) Velocity/time 5. Acceleration (v) Vector quantity

 A B 1. C.G.S. unit of acceleration (ii) cm/s2 2. Motion of a pendulum (iii) Simple harmonic motion 3. Scalar quantity (i) Distance 4. Momentum (v) Vector quantity 5. Acceleration (iv) Velocity/time

Question 25.
Write the unit of momentum.

Answer: kg m/s or kg ms-1

Question 26.
Give one example of simple harmonic motion.

Answer: Motion of the pendulum of a clock

Question 27.
A body is moving with constant velocity, then what will be the acceleration of that body?

Question 28.
What does the odometer of an automobile measure?

Question 29.
The motion of an athlete moving along a circular path, is an example of what type of motion?