(English Medium) ICSE Class 9 - CISCE Question Bank Solutions for Physics

Define acceleration.

What is the SI unit of acceleration?

The acceleration of a moving body is constant in magnitude and direction. Must the path of the body be a straight line?
If not, given an example.

What does a positive acceleration mean?

A body falls towards the earth. Does it have positive or negative acceleration?

The acceleration of a body is 8.5 ms^-2. What does this statement mean?

Write the SI unit of retardation.

A car traveling at 60 km/h, stops on applying brakes in 10 seconds. What is its acceleration?

Write the SI unit of acceleration and retardation.

Distinguish between uniformly and non-uniformly accelerated motions.

Can you use the relation [B₁]?

The initial velocity of a car is 10 ms^-1. It moves with an acceleration of 2 ms^-2. What will be its speed after 10 seconds?

The speed of a car increases from 10 km/h to 64 km/h in 10 seconds. What will be its acceleration?

Out of energy and acceleration, which one is a vector?

The distance covered by a body is directly proportional to the square of the time elapsed. What can you say about its acceleration?

State if the following situation is possible:
A body moving with constant acceleration but with Zero velocity.

State if the following situation is possible:
A body moving horizontally with an acceleration in vertical direction.

State if the following situation is possible:
A body moving with a constant velocity in an accelerated motion.

Is it possible for an accelerating body to have constant speed?