Question

a rubber ball weighs 49N. What is the mass of the ball?

Answer 1

The mass of the ball is approximately 5.0 kilograms. I found the answer by using the equation:

w=mg (weight=mass x gravity)

Weight is in Newtons, on a side note. Plugging in all the variables, you get:

49 N= (m)(9.81 m/s^2)

To solve for the mass, divide both sides by 9.81 m/s^2. Newtons, broken down, is (kilograms x m/s^2):

m=(49 kg x m/s^2)/(9.81 m/s^2)

The ''m/s^2'' in both sides of the equation cancel out, leaving you with kilograms as your final unit. Do the division, and you get approximately 5.0 kg. If you need me to have a more concise explanation, please let me know. :D