A person travelling on a straight line moves with a uniform velocity `v_1` for some time and with uniform velocity `v_2` for the next equal time. The average velocity v is given by

A. particle is in straight line motion with uniform velocity. A force is not required

When a particle is moving with uniform velocity which of the following changes

For a body moving along a straight line, the average velocity is equal to its instantaneous velocity. The motion of the body is

Draw the shape of the velocity-times graph for a body moving with (a) uniform velocity, (b) uniform acceleration.

If a force F is applied on a body and it moves with a velocity V ,the power will be

A motorcar of mass 1200 kg is moving along a straight line with a uniform velocity of 90 km/h. Its velocity is slowed down to 18 km/h in 4 s by an unbalanced external force. Calculate the acceleration and change in momentum. Also calculate the magnitude of the force required.