Practice Questions with Answers - Multiple Choice Questions

# MCQ Questions for Class 9 Science Chapter 8 Motion

## MCQ Questions for Class 9 Science Chapter 8 Motion

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

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