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2014fhp newtons laws
newtons laws of motion
Question | Answer |
---|---|
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 |