A constant retarding force of 50 N is applied to a body of mass 20 kg moving initially with a speed of `15 ms^-1`. How long does the body take to stop?

If a force of 30 Newton is applied on a body of mass 15 kg. What will be its acceleration?

A force of 10 N is applied to a body at rest for 3 sec. The velocity of the body becomes 2 m/s. Find the mass of the body.

A force of 200 N is applied to a body and its velocity changes from 5m/s to 10m/s in a second. What is the mass of the body?

For how long a force of 100 Newton has to be applied on a body at rest of mass 20kg so that its velocity becomes 100 m/sec?

A constant force acting on a body of mass 3.0 kg changes its speed from 2.0 m s^-1 to 3.5 m s^-1 in 25 s. The direction of the motion of the body remains unchanged. What is the magnitude and direction of the force?

A bullet of mass 50 g moving with a speed of 500 ms^-1 is brought to rest in 0.1 sec. Find the impulse and average force.

A boy standing on a stationary lift (open from above) throws a ball upwards with the maximum initial speed he can, equal to 49 m/s. How much time does the bail take to return to his hands? If the lift starts moving up with a uniform speed of 5 m/s and the boy again throws the ball up with the maximum speed he can, how long does the ball take to return to his hands?

A position dependent force F=(7-2x+ 3x^2 )N acts on a small body of mass 2 kg and displaces it from x=0 to x=5m. Work doen in joule is .

On a two-lane road, car A travelling with a speed of 15ms^-1 is approached by two cars B and C moving with speed 20 ms^-1 each in opposite directions. At an instant when the distance AB is equal to AC , both being 700 m, B decides to overtake A before C does. Find the minimum acceleration required by B to avoid accident.

Obtain an expression for the centripetal force required to make a body of mass m moving with a constant speed v around a circular path of radius r.