A box that is sitting against a wall has a mass of 5 kg. The box is pushed with a force of 10 N to the left, but the box does no
1 answer:
The net force acting on the box is zero.
In fact, the box does not move. According to Newton's second law, this means the resultant of the forces acting on the object is zero, because the acceleration of the object is zero:
This also means that the reaction of the wall against the box is equal to the force of 10 N that pushes the box, in order to balance it and have a net force of zero. On the vertical axis instead, the weight of the box (mg) is balanced by the normal reaction of the floor.
In fact, the box does not move. According to Newton's second law, this means the resultant of the forces acting on the object is zero, because the acceleration of the object is zero:
This also means that the reaction of the wall against the box is equal to the force of 10 N that pushes the box, in order to balance it and have a net force of zero. On the vertical axis instead, the weight of the box (mg) is balanced by the normal reaction of the floor.
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Answer:
Explanation:
The tension in the cable would be then equal to the gravitational force that keeps the Moon in circular orbit around the Earth. So, we just need to calculate the magnitude of this force, which is given by:
where:
is the gravitational constant
is the mass of the Moon
is the mass of the Earth
is the distance between the Earth and the Moon
Substituting these numbers into the formula, we find: