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# Laws of Motion

### Newton's Laws of Motion

Newton's First Law of Motion Law of Inertia An object at rest stays at rest and an object in motion stays in motion unless acted on by an unbalanced force.
Newton's Second Law of Motion Law of Acceleration The force of an object is equal to the mass times the acceleration.
Newton's Third Law of Motion Law of Action and Reaction For every action there is an equal and opposite reaction.
An automobile stops, but your body keeps going. Which law? First law of motion.
A skater pushes another skater forward, but the one pushing goes backward. Which law? Third law of motion.
A bowling ball with a mass of 4 kg accelerates down the lane at a rate faster than a 6 kg ball. Which law? Second law of motion.
The force of the gas expansion and explosion pushes a rocket into the sky. Which law? Third law of motion.
You exit a boat. The boat moves backward as you move forward. Which law? Third law of motion.
A skater applies a force and begins skating. Once skating, she'll glide on the ice unless there is unbalanced force. Which law? First law of motion.
A softball player applies a large force to a ball, accelerating it at a high speed. If the ball was smaller, less force would be needed. Which law? Second law of motion.
Find the force of a 20 kg object that accelerates at 2 m/s/s. F = M x A 40 N
Find the mass of an object that accelerates at 6 m/s/s at a force of 36 N. M= F/A 6 kg
Find the force of an object that has a mass of 400 kg and accelerates at 3 m/s/s. F = M x A 1200 N
Two bumper cars collide. They have the same mass and the same speed. Use Newton's third law to explain what will happen. They will bounce backwards from each other at an equal and opposite force.
Created by: cook2sm