Answer to Question #251709 in Mechanics | Relativity for nandu

Question

The shipment of the new physics supplies have arrived. They are placed on the freight elevator and transported up to the third floor for delivery to the physics rooms. The free body diagram at the right depicts the forces acting upon the freight elevator as it begins its ascent through the elevator shaft. Use force values to determine the net force, the mass and the acceleration of the elevator. The values of the individual forces are:

Ftens = 2340 N Fgrav = 2120 N Fnorm1 = Fnorm2 = 276 N.

Answer 1

$\vec F_{tens}+\vec F_{grav}+\vec F_{norm1}+\vec F_{norm2}=\vec F_{net},$

$F_{net}= F_{tens}- F_{grav}+ F_{norm1}- F_{norm2},$

$F_{net}=2340-2120+276-276=220~N.$