Груз массой 20 кг поднимают с помощью системы бар, (см. рис.). Определите выигрыш в силе в каждом случ».
Чему равна сила натяжения каната?

The 5-kg cylinder is initially at rest when it is placed in contact with the wall b and the rotor at a. if the rotor always maintains a constant clockwise angular velocity v = 6 rad> s, determine the initial angular acceleration of the cylinder. the coefficient of kinetic friction at the contacting surfaces b and c is mk = 0.2.

The two required components for a generator

Amira pulls a 3 pound wagon 4 feet. how much work has she done?