SSLC (English Medium) Class 9 - Tamil Nadu Board of Secondary Education Question Bank Solutions

When a body starts from rest, the acceleration of the body after 2 seconds in ______ of its displacement.

The speed of a particle is constant. Will it have acceleration? Justify with an example.

The acceleration of the body that moves with a uniform velocity will be ______.

What is meant by negative acceleration?

m/s² is the unit of ______.

When an object undergoes acceleration ______.

A bus accelerating with 4ms-2 changes its speed from 60ms_1 to a certain value in 5s. The final speed is ______.

A quantity has a value of 16ms-2. It is the ______.

A boy throws a ball up and catches it when the ball falls back. In which part of the motion the ball is accelerating?

If a moving body comes to rest, then its acceleration is ______.

Acceleration is defined as the rate of change of ______.

If a body starts from rest, what can be said about the acceleration of the body?

A car is being driven at a speed of 20ms^-1 when brakes are applied to bring it to rest in 5 s. The deceleration produced in this case will be ______.

The value of acceleration for a body at rest is ______.

Acceleration is a scalar.

An object can be moving with uniform speed but with variable acceleration.

It is possible to have objects moving with uniform speed but variable acceleration.

Assertion: A positive acceleration of a body can be associated with the slowing down of the body.
Reason: Acceleration is a vector.

Assertion: A negative acceleration of a body can be associated with speeding up of the body.
Reason: Increase in the speed of a moving body is independent of its direction of motion.

Assertion: When a body is subjected to a uniform acceleration, it is always moving in a straight line.
Reason: Motion may be straight-line motion or circular motion.