Question

What is the acceleration of a boy on a skateboard if the net force on the boy is 15 N? The total mass of the boy and the skateboard is 58 kg.

Answer 1

force = mass*acceleration
15 = 58 * x
x = 15 / 58
x = 0.26m/s²

Answer 2

Force = (mass) x (acceleration)

If the full 15N is pointing parallel to the ground,
then

15 N = (58 kg) x (acceleration).

Divide each side
by 58 kg: Acceleration = 15 N / 58 kg

= (15 kg-m/s²) / (58 kg)

= (15/58) (kg-m/kg-s²)

= 0.26 m/s² .