A net force of 20 N gives an object an acceleration of 3.8 m/s2. What net force is needed to give the same object an acceleration of 7 m/s2?

Answer 1

From Newton's second law, we have

20 = M * 3.8 (a)

F = M *7 (b)

Divide (b) from (a), we get

F/20 = 7/3.8

F = 20*7/ 3.8 = 36.8N