Question

Laptop sits on a desk the desk applied an upward force of the laptop and keeps it from falling to the floor this force is a push what is the direction of this force?

Answer 1

Directed vertically upwards.

Explanation:

• Every object on the surface of the earth is acted upon by the gravitational force of the Earth.
• This attractive force is proportional to the product of earth's mass and object's mass and inversely proportional to the square of the radius of earth.
• The earth exerts a force on object that is directed towards its center whereas the object exerts an equal force on the earth in the opposite direction.
• The force acting on the body due to earth's gravitation is given by

F = GMm/R²

= mg

• Since the laptop is placed on the desk, it exerts a force equal to its weight on the table.
• According to Newton's third law, the desk exerts an equal force on the laptop but directed vertically upwards.