A parachutist of weight $‘w’$ strikes the ground with his legs fixed and comes to rest with an upward acceleration of magnitude $3 \,g$. Force exerted on him by ground during landing is
$w$
$2w$
$3w$
$4w$
For given systen ${\theta _2}$ ....... $^o$
Define force. What is contact force ? Write two example of field force.
There are four forces acting at a point $P$ produced by strings as shown in figure. Which is at rest ? Find the forces $F_1$ and $F_2$.
Write condition of translational equilibrium of particle.
Define impulse of force. Time derivative of momentum gives which physical quantity ?