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# 2014fhp newtons laws

### newtons laws of motion

What is Newton's Third Law? If an object exerts a force on another object, the second object exerts a force of equal strength in the opposite on the first object.
What is an easy way to remember this? Action/Reaction
Do these forces cancel eachother out? No
When you drop a pencil, is just the pencil accelerating towards the earth? No, they are accelerating towards each other but because the earth's inertia is so big, you do not notice it accelerating.
Who made this law? Isaac Newton
What is the formula for momentum? Mass x Velocity
What is momentum? A characteristic of a moving object that is related to the mass and velocity of a moving object.
What is the unit for momentum? kilogram times meter per second, kg*m/s
Which has more momentum: an elephant or a flea? You don't know because you don't know the speed they are moving at.
which has more momentum: A car moving at 2 m/s and weighing 500 kg, or a dog moving at 110 m/s and weighing 10 kg? the dog, 1100 kg*m/s is more momentum than 1000 kg*m/s
Created by: 2014fhp

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