$A$ body of mass $m_1$ exerts a force on another body of mass $m_2$. If the magnitude of acceleration of $m_2$ is $a_2$,then the magnitude of the acceleration of $m_1$ is (considering only two bodies in space).

$A$ cricket ball of mass $0.25 \,kg$ with speed $10 \,m/s$ collides with a bat and returns with the same speed within $0.01 \,s$. The force exerted on the bat is: (in $\,N$)

$A$ force of $50 \, dynes$ acts on a particle of mass $5 \, g$ for $3 \, seconds$. What is the impulse of the force?

$A$ force-time graph for a linear motion is shown in the figure,where the segments are circular. The linear momentum gained between $0$ and $8$ seconds is

How can we draw a two-object $FBD$ (Free Body Diagram) according to Newton's third law?

$A$ ball of mass $400\, g$ is dropped from a height of $5\, m$. $A$ boy standing on the ground hits the ball vertically upwards with a bat with an average force of $100\, N$ so that it reaches a height of $20\, m$. For how long does the ball remain in contact with the bat (in $, s$)? $[g = 10\, m/s^2]$