A 5.0 m weightless strut, hinged to a wall, is used to support a 800-N block as shown. The horizontal and vertical components of the force of the hinge on the strut are: A) F_H= 800 N, F_Y = 800 N B) F_H= 600 N, F_Y = 800 N C) F_H= 800 N, F_Y = 600 N D) F_H= 1200 N, F_Y = 800 N E) F_H= 0 , F_Y = 800 N

Question

Quizplus · Accepted Answer

Since the strut is weightless, the only forces acting on the block will be due to the hinge. The horizontal component of the force at the hinge will cancel out the block's weight, so it must be 800 N. The vertical component of the hinge force must counteract the block's weight and support it, so it will be greater than 800 N. The only option that satisfies these conditions is B, with a vertical hinge force of 800 N and a horizontal hinge force of 600 N.

A 50 M Weightless Strut, Hinged to a Wall, Is Used