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3 cards from this section. Quick, good the night before a test.
What is the unit of force?
Think about what we measure force with.
State the first law of motion.
This is about inertia!
What does Newton's First Law state?
Think about what happens to an object when there are no forces acting on it.
True or False: A force is only a push.
Recall how forces are defined.
A cyclist of mass 70 kg accelerates from rest to a speed of 15 m/s in 10 seconds. Calculate the force exerted on the bike.
Remember to find acceleration first before calculating force.
If a rocket expels gas at 2000 kg/s at a speed of 400 m/s, what force is produced by the rocket?
Think of how much gas is expelled and its velocity.
5 more questions in this section. Enroll free to practise them all.
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