$A$ book is lying on the table. What is the angle between the action of the book on the table and the reaction of the table on the book?

What is impulse of force? Write its unit and dimension.

$A$ particle of mass $m$, initially at rest, is acted upon by a variable force $F$ for a brief interval of time $T$. It begins to move with a velocity $u$ after the force stops acting. The graph shows $F$ as a function of time, where the curve is a semicircle with peak force $F_0$ at time $T/2$.

$A$ cricket ball of mass $500\, g$ collides with a bat with speed $15\, m/s$ and returns with the same speed within $0.01\, s$. The force acted on the bat is ............ $N$.

$A$ bus of mass $1000\,kg$ is standing at a station. What is the linear momentum of the bus?

Which parameter is used to determine the effect of force on a body?