Velocity vs. time graph of a ball of mass $10 \mathrm{g}$ rolling on a concrete floor is shown in the figure. Calculate the acceleration and frictional force of floor on the ball.

In a two body collision, the momentum is varying with time as shown in graph. The instantaneous force is maximum at: 

The variation in momentum with time, for a body under collision is shown in figure. The maximum & minimum instantaneous forces are respectively on these points:

A force ‘F’ is applied on one end of a rope of length ‘a’. P and Q are two points of length ‘b’ from nearest end. The ratio of tensions in string at P & Q is :

A dynamometer D is attached to two masses $m_1=3 \mathrm{kg}$ and $m_2=5 \mathrm{kg}$. Forces of $f_1=9 \mathrm{N}$ and $f_2=25 \mathrm{N}$ are applied to the masses as shown.

The dynamometer will read :

The velocity-time graph of a ball of mass $20 \mathrm{g}$ moving along a straight line on a long table is given in figure.The force exerted by the table on the ball to bring it to rest is :

A player caught a cricket ball of mass $150 \mathrm{g}$moving at a rate of $20 \mathrm{m}/\mathrm{s}$. The catching process is completed in $0.1$ second. The force exerted by the ball on the hand of the player is

Read the following statements and choose the correct option:
Statement: Newton's second law of motion gives the measurement of force. 
Reason: According to Newton's second law of motion, force is directly proportional to the rate of change of momentum. 

Two similar trucks are moving with the same velocity on a road. One of them is loaded while the other is empty. Which of the two will require a larger force to stop it?