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 225 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)
Responses

-175 N; the slab will remain stationary
-175 N; the slab will remain stationary

-50 N; the slab will remain stationary
-50 N; the slab will remain stationary

175 N; the slab will move upward
175 N; the slab will move upward

50 N; the slab will move upward
50 N; the slab will move upward

Answer 1

Total upward force = 225 N + 225 N = 450 N.
Net force = 450 N (up) − 400 N (down) = +50 N.

So the net force is 50 N upward, and the slab will move (accelerate) upward.