Question

two construction workers are attempting to pull a slab of concrete off of the ground. each of the workers are pulling up with a force of 250 n, while the slab of concrete applies a gravitational force of 400 n in the opposite direction, remaining stationary. if the pulling forces applied to the slab of concrete are assigned a positive value, what is the net force of the scenario, and in which direction will the slab of concrete move? (1 point) 100 n; the slab will move upward -100 n; the slab will remain stationary -150 n; the slab will remain stationary 50 n; the slab will move upward

Explanation:

Step1: Calculate total pulling force

Each worker pulls with 250 N, so total pulling force $F_{pull}=250\times2 = 500$ N.

Step2: Calculate net force

Gravitational force $F_{g}=400$ N. Net force $F_{net}=F_{pull}-F_{g}=500 - 400=100$ N.

Step3: Determine direction of movement

Since net force is positive (100 N), slab moves upward.

Answer:

100 N; the slab will move upward