Question

A heavy box of mass of 30 kg is placed on a horizontal surface , find the normal reaction if the acceleration due to gravity is 10 m/s square​

Answer 1

Answer:

support force F = mass x acceleration + weight

For a mass m= kg, the elevator must support its weight = mg = Newtons to hold it up at rest. If the acceleration is a= m/s² then a net force= Newtons is required to accelerate the mass.