When an object moves with varible velocity, either its ___ or _____ of motion change with time.

Plot ,displacement-time graph when an object is moving with infinite velocity.Is such a motion of an object ever possible?

Two objects of masses 100 g and 200 g are moving along the same line and direction with velocities of 2ms^(-1) and 1ms^(-1) respectively. They collide and after the collision, the first object moves with a velocity of 1.67ms^(-1) Determine the velocity of the second object.

Two objects of masses 100 g and 200 g are moving along the same line and direction with velocities of 2 m/s and 1 m/s, respectively. They collide and after the collision , the first object moves at a velocity of 1.67 m /s Determine the velocity of the second object.

The kinetic energy of an object of mass 'm' moving with a velocity of 5ms^-1 is 25 J. What will be its kinetic energy when its velocity is doubled ? What will be its kinetic energy when its velocity is increased to three times.

Can an object be at rest as well as in motion at the same time ?