Velocity versus time graph of a ball of mass 50 g rolling on a concrete floor is shown below. Calculate the acceleration and the frictional force of the floor on the ball?

The physical quantity which makes it easier to accelerate a small car than a large is measures in the unit of:

A. m/s B. kg

C. kg m/s D. kg m/s²

A car of mass 2400 kg moving with a velocity of 20 m s^-1 is stopped in 10 seconds on applying brakes. Calculate the retardation and the retarding force.

Fill in the following blanks with suitable words:

(a) To every action, there is an ………. and ……..reaction.

(b) Momentum is a ……..quantity. Its unit is …………….

(c) Newton’s second law of motion can be written as Force = mass × …………… or Force = …………….. or change of …………

(d) Forces in a Newton’s third law pair have equal …………… but act in opposite …………

(e) In collisions and explosions, the total ………… remains constant, provided that no external ………… acts.

The rate of change of momentum is:

The acceleration produced by a force of 5 N acting on a mass of 20 kg in m/s2 is:

A. 4 B. 100

C. 0.25 D. 2.5

State the relation between the momentum of a body and the force acting on it.