Question 1 :
Two hockey players of opposite teams, while trying to hit a hockey ball on the ground collide and immediately become entangled. One has a mass of 60 kg and was moving with a velocity 5.0 $ms^{-1}$ while the other has a mass of 55 kg and was moving faster with a velocity 6.0$ms^{-1}$ towards the first player. In which direction and with what velocity will they move after they become entangled? Assume that the frictional force acting between the feet of the two players and ground is negligible.

Question 2 :
An object of mass 100 kg is accelerated uniformly from a velocity of 5 $ms^{-1}$ to 8 $ms^{-1}$ in 6 s. Find the magnitude of the force exerted on the object.

Question 3 :
Using a horizontal force of 200 N, we intend to move a wooden cabinet across a floor at a constant velocity. What is the friction force that will be exerted on the cabinet?

Question 4 :
Which of the following has more inertia; a bicycle and a train?

Question 5 :
Explain, why is it difficult for a fireman to hold a hose, which ejects a large amount of water at a high velocity.

Question 6 :
A truck starts from rest and rolls down a hill with a constant acceleration. It travels a distance of 400 m in 20 s. Find its acceleration. Find the force acting on it if its mass is 7 tonnes.

Question 7 :
An object experiences a net zero external unbalanced force. Is it possible for the object to be travelling with a non-zero velocity?

Question 8 :
According to the third law of motion, the force $F_{AB}$ exerted by ball A on ball B and the force $F_{BA}$ exerted by the ball B on ball A must be equal and opposite to each other. Therefore, _____________.

Question 9 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d2bcf59b460d7261f61a.png' /> The following is the distance-time table of an object in motion (given above).What conclusion can you draw about the acceleration? Is it constant, increasing, decreasing, or zero?

Question 12 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d2bcf59b460d7261f619.png' /> The velocity-time graph of a ball of mass 20 g moving along a straight line on a long table is given in above picture. How much force does the table exert on the ball to bring it to rest?

Question 13 :
A force of 5 N gives a mass $m_{1}$ , an acceleration of 10 $ms^{-2}$ and a mass $m_{2}$ , an acceleration of 20 $ms^{-2}$. What acceleration would it give if both the masses were tied together?

Question 14 :
In a qualitative way, the tendency of undisturbed objects to stay at rest or to keep moving with the same velocity is called ________.

Question 15 :
Two objects, each of mass 1.5 kg, are moving in the same straight line but in opposite directions. The velocity of each object is 2.5 $ms^{-1}$ before the collision during which they stick together. What will be the velocity of the combined object after collision?

Question 16 :
A bullet of mass 20 g is horizontally fired with a velocity 150 $ms^{-1}$ from a pistol of mass 2 kg. What is the recoil velocity of the pistol?

Question 18 :
Which of the following has more inertia; a five-rupees coin and a one-rupee coin?

Question 19 :
An object of mass 1 kg travelling in a straight line with a velocity of 10 $ms^{-1}$ collides with, and sticks to, a stationary wooden block of mass 5 kg. Then they both move off together in the same straight line. Calculate the total momentum just before the impact and just after the impact. Find the velocity of the combined object.