A car moving on a straight road covers one third of the distance with 20 km/hr and the rest with 60 km/hr. The average speed is

The displacement of a particle, moving in a straight line, is given by s = 2t² + 2t + 4 where s is in metres and t in seconds.The acceleration of the particle is

The position x of a particle varies with timeThe acceleration of the particle will be zero at time t equal to

The displacement of the particle is given by  The initial velocity and acceleration are respectively

The relation between time t and distance x is  where are constants. The retardation is

If displacement of a particle is directly proportional to the square of time. Then particle is moving with

A particle is moving eastwards with velocity of 5 m/s. In 10 sec the velocity changes to 5 m/s northwards. The average acceleration in this time is

A body starts from the origin and moves along the x-axis such that velocity at any instant is given by (4 t³ – 2t) where t is in second and velocity is in m/s. What is the acceleration of the particle, when it is 2m from the origin?

A body of mass 10 kg is moving with a constant velocity of 10 m/s. When a constant force acts for 4 sec on it, it moves with a velocity 2 m/sec in the opposite direction. The acceleration produced in it is

The position of a particle moving along the x-axis at certain times is given below :

Which of the following describes the motion correctly