Introduction to Motion of System of Particles and Rigid Body

A motor is rotating at a constant angular velocity of $500 \mathrm{rpm}$. The angular displacement per second is

If three co-planer forces acting at a point, be in equilibrium, each force is proportional to the

Force acting on a body is so directed that its line of action passes through any other point of the body. Explain the motion of the body in this case.

What are like and unlike parallel forces? How can you find the resultant of a number of unlike parallel forces?

A $60 \mathrm{m}$ ladder weighing $100 \mathrm{kg}$ rests against a wall at a point $48 \mathrm{m}$ above the ground. The CG of the ladder is $\frac{1}{3} \mathrm{rd}$ the way up. A $160 \mathrm{kg}$ man climbs halfway up the ladder. Assuming that the wall is smooth, find the force exerted by the system on the ground and the wall.