A steel ladder of mass 40 kg and of length 20 m leans against a frictionless wall at a point 16 m above the ground. For safety purpose, the center of mass of the ladder is designed to be a quarter the way up. A 60 kg man is standing halfway up the ladder. (a) Calculate the reaction R from the ground and the angle θ it makes with the vertical. (b) If the man is to stand on the top of the ladder without slipping, find the minimum value for the coefficient of static friction between the ladder and the ground.
Rotational Equilibrium And Rotational Dynamics
In physics, the state of balance between the forces and the dynamics of motion is called the equilibrium state. The balance between various forces acting on a system in a rotational motion is called rotational equilibrium or rotational dynamics.
Equilibrium of Forces
The tension created on one body during push or pull is known as force.
A steel ladder of mass 40 kg and of length 20 m leans against a frictionless wall at a point 16 m above the ground. For safety purpose, the center of mass of the ladder is designed to be a quarter the way up. A 60 kg man is standing halfway up the ladder.
(a) Calculate the reaction R from the ground and the angle θ it makes with the vertical.
(b) If the man is to stand on the top of the ladder without slipping, find the minimum value for the coefficient of static friction between the ladder and the ground.
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