Question

Barbara pushes her friend Sharon on a skateboard. Barbara applies a force of 225 N and Sharon's acceleration is 2.3 m/s2. What is the combined mass of Sharon and her skateboard?

Answer 1

F = m*a
(Force) = (mass x acceleration)

1) Plug the numbers into the corresponding variables using parentheses:

(225) = m*(2.3)

2) Divide 2.3 on each side so that the variable and the numbers are not separate sides

225/2.3 = m* 2.3/2.3
97.83 = m

3) Rewrite your answer.

The combined mass of Sharon and her skateboard is 97.83 kg.
(Remember that kg or kilograms is the proper SI Unit for mass)\

Hope this helps!!