Mammoth Memory

Newton's laws of motion: questions and answers

1. A baseball is thrown at `150m//s^2` and its mass is `0.5kg`. What is the force?





`F=75N` (Newtons)

2. Two skateboarders stand facing each other.

Male and female skaters standing facing each other.

One skateboarder, the woman, weighing `57kg` pushes the other skateboarder the man who is `81kg` with a force of `85N`. What is the acceleration of each skater?



Using Newton's third law, the force on the man must be equal and opposite to the womans, so it must be `85`Newtons. We could even say it is minus `85`Newtons.

Now using Newton's second law `F=ma`







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