A 10-kg mass is suspended by a rope. What is the acceleration if the tension in the rope is 118 N while the mass is in motion?

There are two forces on the mass:

- - the force of gravity downward ... (10kg) x (9.8 m/s²) = 98 newtons downward

- - the tension in the rope upward ... 118 newtons upward

The NET force on the mass is (118 - 98) = 20 newtons upward.

F = M a

Divide each side by 'M' : a = F / M

a = (20 newtons upward) / (10kg)

a = 2 m/s² upward