A car is moving with a uniform velocity of 30 m s^-1. It is stopped in 2 s by applying a force of 1500 N through it's brakes. Calculate (a) the change in momentum of car, (b) the retardation produced in car, and (c) the mass of the car.

A bullet of mass 50 g moving with an initial velocity of 100 m s^-1, strikes a wooden block and comes to rest after penetrating a distance 2 cm in it. Calculate (i) initial momentum of the bullet (ii) final momentum of the bullet, (iii) retardation caused by the wooden block, and (iv) resistive force exerted by the wooden block

The motion of a boat moving away from the shore is an example of :

1. Newton's first law
2. Newton's second law
3. Newton's third law
4. not related with Newton's law

In an interaction of two bodies A and B, which of the following statements is correct ?

1. $\overrightarrow{\text{F}}${\text{AB}} = \overrightarrow{\text{F}}{\text{BA}}
2. $\overrightarrow{\text{F}}${\text{BA}} \ge \overrightarrow{\text{F}}{\text{AB}}
3. $\overrightarrow{\text{F}}${\text{AB}} = -\overrightarrow{\text{F}}{\text{BA}}
4. $\overrightarrow{\text{F}}${\text{AB}} \gt \overrightarrow{\text{F}}{\text{BA}}