A box is resting on a table
frictionless). Determine the weight of the box and the normal force acting on it.
(a) If the box was pushed down, with a force of 40N, determine again the normal force acting on the box.
(b) If the box was pulled up with a force of 40N, what now is the normal force on the box?
-Can you please use Newton's Laws and equations to help explain how to solve this problem. im lost, but thank you for any help. =)
Hey do you go to proyecto? =]
Look to the response to Jodie!
To determine the weight of the box and the normal force acting on it, we'll use Newton's laws and equations.
First, let's define the weight of the box as the force due to gravity acting on it. According to Newton's second law, the weight of an object is given by the equation:
Weight = mass × acceleration due to gravity
Since the box is at rest on the table, its acceleration is 0, so the weight of the box is also 0.
Now let's consider the normal force acting on the box. The normal force is the force exerted by the table to support the weight of the box, and it acts perpendicular to the surface of the table. According to Newton's third law, the normal force is equal in magnitude and opposite in direction to the weight of the box when it is at rest.
(a) When the box is pushed down with a force of 40N, the weight of the box remains the same (0N), but the normal force changes. Newton's third law tells us that the normal force will be equal in magnitude and opposite in direction to the applied force. So, the normal force acting on the box will be 40N in the upward direction.
(b) When the box is pulled up with a force of 40N, again the weight of the box remains 0N, but the normal force changes. Newton's third law states that the normal force will be equal in magnitude and opposite in direction to the applied force. So, the normal force acting on the box will be 40N in the downward direction.
Therefore, the weight of the box is 0N in both situations, and the normal force acting on the box is 40N upwards when pushed down and 40N downwards when pulled up.