7th Grade Laws Of Motion Page 2

direction. Another example is if you and your friend are wearing roller blades and you

push your friend in one direction, you will travel in the opposite direction.

Laws of Motion Exercises:

For the equations: F is measured in newtons

M (mass) is measured in kg

A (acceleration) is measured in m/s²

Equations: F=MA or A=F/M

1. A car weighs 1000kg, you can push it .05 m/s², how much force (F) are you applying

to the car? Here we use F=MA:

F= 1000 x .05

F= 50 newtons

2. Another car weighs 2000kg, you can push it .05 m/s², how much force are you

applying to the car? Again use F=MA.

3. A force of 5000 newtons is applied to a 1200 kg car at rest. What is its acceleration?

(m/s²)

4. A 10kg body has an acceleration of 2 m/s². Find the net force (F) acting on the body.

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