Equilibrium: a Woman Is Straining to Lift a Large Crate

question 23

Multiple Choice

Equilibrium: 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