A child pushes down on a box lid with a force of 25 N. At the same time, her friend pushed down on the lid with a force of 30N. The spring on the box lid pushes upward with a force of 60N. Can the children close the box? Why or why not?
25 + 30 =55N and add 60 to 55N and the answer I think is 115N so the kid should be able to close the box with 115N.
no
the spring pushes harder against the kids
To determine if the children can close the box, we need to calculate the net force acting on the box lid.
The child's force is 25 N, while her friend's force is 30 N. Since both forces are in the same direction (pushing down on the lid), we can add them together to get the total downward force:
25 N + 30 N = 55 N
Now, we take into account the upward force from the spring, which is 60 N. The spring force is pushing against the downward force applied by the children.
To calculate the net force, we subtract the upward force of the spring from the downward force of the children:
55 N - 60 N = -5 N
The negative sign indicates that the net force is in the upward direction. This means that the upward force from the spring is greater than the combined downward force applied by the children.
Based on this calculation, the children cannot close the box because the net force is working against them. The spring force is stronger than the force they are applying, preventing the lid from closing.
To determine if the children can close the box, we need to calculate the net force acting on the lid.
The net force is the vector sum of all forces acting on an object. In this case, there are two downward forces (25 N and 30 N) and one upward force (60 N).
To calculate the net force, we need to subtract the sum of the upward forces from the sum of the downward forces:
Net force = (25 N + 30 N) - 60 N
Net force = 55 N - 60 N
Net force = -5 N
The negative value indicates that the net force is in the opposite direction of closing the box. As a result, the children cannot close the box because the net force acting on the lid is 5 N in the opposite direction.