Question 1 :
A body of mass 1 kg moves with a velocity $5 \ m s^{-1}$. A force is applied on it for $1\ ms$ such that its velocity is increased to $7 \ m s^{-1}$. The force applied<span> </span>on the body is:
Question 2 :
China wares are wrapped in straw or paper before packing. This is the application of concept of :<br>
Question 3 :
The magnitude of the impulse developed by a mass of $0.2$kg which changes its velocity from $5\hat{i}+3\hat{j}+7\hat{k}$ m/s to $2\hat{i}+3\hat{j}+\hat{k}$
Question 4 :
A fish is swimming in the ocean. Which of the following represents the interaction between the fish and the water?<br/>
Question 5 :
A force of 10 N acts on a body for 3 microsecond $(\mu s)$. Calculate the impulse. If mass of the body is 5 g, calculate the change of velocity.<br>
Question 7 :
A ball of mass $m$ falls vertically to the ground from a height ${h_1}$ and rebound to a height ${h_2}$. The change in momentum of the ball on striking the ground is
Question 8 :
The effect of an impulse force on the body is measured only in terms of its
Question 9 :
A cricket ball of mass 120 g is moving with a velocity of 12 m $s^{-1}$. It turns back and moves with a velocity of 20 m $s^{-1}$ when hit by a bat. Find the impulse if the force acts on the ball for 0.02 s.
Question 10 :
A force of $50 \ dynes$ is acted on a body of mass $5 g$ which is at rest for an interval of $3 s$, then impulse  is:<br/>
Question 11 :
From a stationary tank of mass $125000$ pound, a small shell of mass $25$ pound is fired with a muzzle velocity of $1000\ ft/sec$. The tank recoils with a velocity of ..........
Question 12 :
A bullet of mass $50\ g$ travelling at $500\ m/s$ penetrates $100\ cm$ into a wooden block. Find the average force exerted on the block.
Question 13 :
A weight lifter 300 kg from the ground to a height of 2 meter in 33 seconds. The average power generated by him is:-
Question 14 :
The one which does not represent a force in any context is:
Question 15 :
Two identical bullets are fired one by a light rifle and another by a heavy rifle with the same force. Which rifle will hurt the shoulder more and why ?<br><br>
Question 16 :
An impulse $\vec { 1 }$ changes the velocity of a particle from $\vec { v } _ { 1 }$ to $\vec { v } _ { 2 }$ . Kinetic energy gained by the particle is
Question 17 :
If n balls hit elastically and normally on a surface per unit area and all units has mass m and are moving with same velocity u, then force on surface is: 
Question 18 :
Two balls of same mass are dropped from the same height h , on to the floor . the first ball bounces to a height h/4, after the collection & the second ball to a height h/16. the impulse applied by the first & second ball on the floor are ${I_1}$ and ${I_2}$ respectively . then
Question 19 :
A large truck and a car, both moving with a velocity of magnitude $v$, have a head-on collision. If the collision lasts for $1\ s$ which vehicle experiences greater force of impact?<br/>
Question 20 :
A machine gun fires n bullets per second and the mass of each bullet is m. If v is the speed of each bullet then force exerted on machine gun is