Which of the following is the correct order of forces
Weak $<$ gravitational forces $<$ strong forces (nuclear) $<$ electrostatic
Gravitational $<$ weak $<$ (electrostatic) $<$ strong force
Gravitational $<$ electrostatic $<$ weak $<$ strong force
Weak $<$ gravitational $<$ electrostatic $<$ strong forces
At the instant $t = 0$ a force $F = kt$ ( $k$ is a constant) acts on a small body of mass $m$ resting on a smooth horizontal surface. The time, when body leaves the surface is
A uniform rope of mass $M$ and length $L$ is fixed at its upper end vertically from a rigid support. Then the tension in the rope at the distance $l$ from the rigid support is $x$
A parachutist with total weight $75 \,kg$ drops vertically onto a sandy ground with a speed of $2 \,ms ^{-1}$ and comes to halt over a distance of $0.25 \,m$. The average force from the ground on her is close to ............ $N$
In the system shown in the adjoining figure, the tension $T_2$ is
Out of contact force and field force which force is conservative and which force is nonconservative ?