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Phy Sci U1
newtons first law, interia, and motion
Question | Answer |
---|---|
distance | how far you have traveled between two positions. It is always positive. It is a scalar quantity. |
displacement | change in position. It is the straight line distance between your starting position and ending position. It is equal to Final position minus initial position. It can be positive or negative. It is a vector quantity. |
scalor | quantity that only requires magnitude (how big) |
vector | quantity that requires both magnitude (how big) and directions |
speed | how fast something is moving. It is equal to distance divided by time. It is a scalar quantity |
velocity | rate at which position changes. It is equal to displacement divided by time. It is a vector quantity |
Newton’s First Law | AKA the law of inertia. An object at rest will stay at rest and an object in motion will stay in motion with the same speed and in the same direction unless acted upon by an unbalanced force |
Mass | a measure of the amount of matter an object contains. Also, a measure of the amount of inertia an object has. |
Inertia | the resistance an object has to changes in its motion. |
Force | any push or pull (interaction) that can cause a change in motion. |