When a body accelerates by erf, what is the velocity after time T, when it starts from rest?

Can a paricle accelerate when its velocity is constant?

What is the momentum of a body of mass 10kg when it is at rest?

A balloon is rising with a speed of 5ms^-1 . When it is at a height of 98m a packet is dropped from it. What is the velocity of the packet when it strikes the ground?

When there is acceleration in a body:

A motor car starting from rest travelled for 10 seconds with an uniform. acceleration of 5 m //s ^2 . What is the final velocity? Find the distance covered by the car.

When a body of mass 'm' moves with a velocity 'v' its kinetic energy-

A force of 10 N is applied to a body at rest for 3 sec. The velocity of the body becomes 2 m/s. Find the mass of the body.

When do we call a body rigid?

When a body moves with constant speed along a circle

Derive acceleration from velocity-time graph.