two bodybuilders are picking up a dumbbell off the ground. each of the bodybuilders is pulling with a force of 700n , while the dumbell applies a gravitational force of 1372N in the opposite direction. If the pulling forces applied to the dumbbell are assigned a positive value, what is the net force of the scenario, and wi the dumbbell move?

Question

672 N
28 N
-28 N
-672 N

Answer 1

In this scenario, we have two bodybuilders each pulling with a force of 700 N. Therefore, the total pulling force exerted on the dumbbell is:

\[ F_{\text{pulling}} = 700 , \text{N} + 700 , \text{N} = 1400 , \text{N} \]

The gravitational force acting on the dumbbell is 1372 N in the opposite direction.

To find the net force, we can subtract the gravitational force from the total pulling force:

\[ F_{\text{net}} = F_{\text{pulling}} - F_{\text{gravity}} = 1400 , \text{N} - 1372 , \text{N} = 28 , \text{N} \]

Since the net force is positive (28 N), this means the bodybuilders are applying enough force to lift the dumbbell off the ground.

So, the net force is 28 N, and yes, the dumbbell will move upward.