Question

An elevator with mass of 150kg is accelerating upward at 0.3 m/s2. Find the force exerted by the cable on the elevator (in N):

Answer 1

Solution

Answer: 1515 N

If we chose upward direction to be positive and write down the second law for elavator, there are only two forces acting on the elevator. Upward tension by cable and downward gravitational force (weight of the elavator) thus,

Thus substituting the values, acceleration a= 0.3m/s^2, acceleration due to gravity g=9.8m/s^2 and mass of elavator m=150kg

Thus answer is 1515 N