Laws of Motion ...

The effect of an impulse force on the body is measured only in terms of its

Physical independence of force is a consequence of _____.

A stationary ball weighing 0.25 kg acquire a speed of $$10\:m/s$$ when hit by a hockey stick. The impulse imparted to the ball is:

A disc of mass 10 g is kept floating horizontally by throwing 10 marbles per second against it from below. The marbles strike the disc normally and rebound downwards with the same speed. If the mass of each marble is 5 g, the velocity with which the marbles are striking the disc is $$\displaystyle \left( g=9.8{ m }/{ { s }^{ 2 } } \right) $$

A stationary ball weighing 0.25 kg acquires a speed of 10 m/s when hit by a hockey stick. The impulse imparted to the ball is :

A ball weighing $$10  g$$ hits a hard surface vertically with a speed of $$5  {m}/{sec}$$ and rebounds with the same speed. The ball remains in contact with the surface for $${1}/{100}  sec$$. The average force exerted by the surface on the ball is

A boat at rest has two persons of unequal weights seated at either end. If they walk across the boat and interchange their positions,

Two forces act on either side of rigid body of negligible mass suspended by string as shown in the figure. If R is the resultant force the tension of the string T = _____ gwt.

A hammer weighing $$3  kg$$, moving with a velocity of $$10  {m}/{s}$$, strikes against the head of a spike and drives it into a block of wood. If the hammer comes to rest in $$0.025  s$$, the impulse associated with the hammer will be

A rubber of mass $$200$$ g hits a wall normally with a velocity of $$\displaystyle { 10\ ms }^{ -1 }$$  and bounces back with a velocity of $$\displaystyle { 8\ ms }^{ -1 }$$. The impulse is _____ Ns.