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

Answer

Answer: (b) Issac Newton


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

Answer

Answer: (b) velocity


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

Answer

Answer: (a) acceleration


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

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

Answer

Answer: (b) m/s2


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

Answer

Answer: (a) ms-1


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

Answer

Answer: (c) 2r


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

Answer

Answer: (b) u2/2g


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

Answer

Answer: (c) the acceleration


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

Answer

Answer: (b) uniform acceleration


Fill in the Blanks.

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

Answer

Answer: first


Question 12.
Negative acceleration is known as __________

Answer

Answer: retardation


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

Answer

Answer: linear motion


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

Answer

Answer: Galileo, Newton


Question 15.
Velocity is _______ quantity.

Answer

Answer: vector


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

Answer

Answer: constant


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

Answer

Answer: zero


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

Answer

Answer: velocity


True/False.

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

Answer

Answer: True


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

Answer

Answer: False


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

Answer

Answer: True


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

Answer

Answer: True


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

Answer

Answer: True


Match the Column.

Question 24.

AB
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
Answer

Answer:

AB
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

Answer in one Word/Sentence.

Question 25.
Write the unit of momentum.

Answer

Answer: kg m/s or kg ms-1


Question 26.
Give one example of simple harmonic motion.

Answer

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?

Answer

Answer: zero (0)


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

Answer

Answer: The distance travelled


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

Answer

Answer: An accelerated motion


 


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