You are standing in an elevator that is accelerating upward at 2 m/s2. What is the normal force acting on you by the elevator if your mass is 70 kg?

784 N.

Explanation:

The expression for the Normal reaction acting on a body inside an elevator that is moving upward is given as

R = m (g+a) ... Equation 1

Where R = normal reaction, g = acceleration due to gravity, a = acceleration, m = mass.

Given: m = 70 kg, a = 2 m/s²

Constant: g = 9.8 m/s²

Substitute into equation 1

R = 70 (2+9.2)

R = 70 (11.2)

R = 784 N.

Hence the normal force = 784 N.