Question
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?
672 N
28 N
-28 N
-672 N
672 N
28 N
-28 N
-672 N
Answers
GPT-4o mini
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.
\[
F_{\text{pulling}} = 700 \, \text{N} + 700 \, \text{N} = 1400 \, \text{N}
\]
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.