A $2\ kg$ object is floating at rest, acted upon by only force as indicated in figure. Find the total work done by the force in $3\ sec$ ..................... $\mathrm{J}$

If the increase in the kinetic energy of a body is $22\%$, then the increase in the momentum will be ........... $\%$

$A$ block of mass $m$ slides down a plane inclined at an angle $\theta$ . Which of the following will $NOT$ increase the energy lost by the block due to friction?

An unloaded bus can be stopped by applying brakes on straight road after covering a distance $x$. Suppose, the passenger add $50 \%$ of its weight as the load and the braking force remains unchanged, how far will the bus go after the application of the brakes? (Velocity of bus in both case is same)

KE acquired by a mass $m$ in travelling a certain distance $d$, starting from rest, under the action of a constant force $F$ is ..........

A body of mass $1\,kg$ is thrown upwards with a velocity $20\, m/s.$ It momentarily comes to rest after attaining a height of $18\, m.$ How much energy is lost due to air friction ? ........... $\mathrm{J}$ $ (g = 10 \,m/s^2)$