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Matter in Motion
Motion, Force, Friction, Gravity
Question | Answer |
---|---|
What is a reference point? | An object that stays in place. |
What is the SI unit for speed? | m/s (meters per second) |
Give the formula for speed | speed = distance / time |
Describe velocity in 3 words. | speed with direction |
What is a force? | a push or a pull |
What unit do scientists use to measure force? | Newton |
The combination of all the forces acting on an object. | Net force |
Forces in the same direction are: | added |
Forces in opposite directions are: | subtracted |
Is there any movement when the forces are balanced? | no |
Is there any movement when the forces are unbalanced? | yes |
A force that opposes motion between 2 surfaces | friction |
In 1 word, describe kinetic friction | moving |
In 2 words, describe static friction | not moving |
Who described the Law of Universal Gravitation? | Sir Isaac Newton |
What is mass a measure of? | the amount of matter in an object |
What is weight a measure of? | the amount of gravitational force on an object |
Is mass always the same no matter where you go in the universe? | yes |
Is weight always the same no matter where you go in the universe? | no |