A woman is straining to lift a large crate,without success because it is too heavy.We denote the forces on the crate as follows: P is the upward force the woman exerts on the crate,C is the vertical contact force exerted on the crate by the floor,and W is the weight of the crate.How are the magnitudes of these forces related while the woman is trying unsuccessfully to lift the crate? A) P + C = W B) P + C W D) P = C

Question

A woman is straining to lift a large crate,without success because it is too heavy.We denote the forces on the crate as follows: P is the upward force the woman exerts on the crate,C is the vertical contact force exerted on the crate by the floor,and W is the weight of the crate.How are the magnitudes of these forces related while the woman is trying unsuccessfully to lift the crate?
A) P + C = W
B) P + C < W
C) P + C > W
D) P = C

Quizplus · Accepted Answer

P + C = W. When the woman is trying to lift the crate but is unsuccessful, the crate does not move, indicating it is in static equilibrium. Therefore, the sum of the upward forces (P + C) must equal the downward force (W) due to gravity.

A Woman Is Straining to Lift a Large Crate,without Success