Question

The 75.0 kg hero of a movie is pulled upward with a constant acceleration of 2.00 m/s2 by a rope. What is the tension on the rope?

585N


75.0N


885N


11.8N

Answer 1

Use Newton's second law. The net force on the hero is

∑ F = T - m g = m (2.00 m/s²)

where

• T = tension in the rope

• m = 75.0 kg = mass of the hero

• g = 9.80 m/s² = acceleration due to gravity

Solve for T :

T = (75.0 kg) (g + 2.00 m/s²) = 885 N