what must the crane work against in order to lift the box upward?
. wind
. friction
. gravity
. cable tension
I think it is gravity but its probably wrong because I suck at science and I get like B's and hardly A's
Im here to say that Caroline is right and that she helped me with this question!!!!
No help itvis a
I think I is A
i think its friction or gravity
To determine what the crane must work against in order to lift the box upward, we need to consider the forces at play. Here are the options:
1. Wind: Wind is an external force that can affect the stability of the crane, but it does not directly oppose the upward lifting force. Therefore, wind is not the correct answer.
2. Friction: Friction exists between the surfaces of the crane and the box, as well as between the crane and the ground. However, the frictional force does not oppose the upward lifting force, so friction is not the correct answer either.
3. Gravity: Gravity is the force that pulls objects towards the center of the Earth. In this case, gravity is pulling the box downward, creating a force that the crane must work against to lift the box upward. Therefore, gravity is the correct answer.
4. Cable Tension: The tension in the cable is the force transmitted through the cable that pulls the box upward. The crane uses this tension force to counteract the force of gravity and lift the box. However, cable tension itself is not an opposing force that the crane has to work against, so it is not the correct answer.
In summary, the crane must work against the force of gravity in order to lift the box upward.