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ps unit 1
newtons 1st law, inertia and motion
Question | Answer |
---|---|
distance | how far you have traveled between two positions |
displacement | change in position. it is in a straight line distance between your starting and ending position |
scalar | quantity that only requires magnitude |
vector | quantity that requires both magnitude and directions |
speed | how fast something is moving. equal to distance divided by time |
velocity | rate at which position changes. it is equal to distance divided by time |
applied force | The support force exerted upon an object that is in contact with another stable object. it is in the direction of the push or pull |
normal force | a contact force that is exerted by a surface against an object that is pressing against the surface |
tension force | a contact force exerted by a taut string, rope, or wire on an object |
friction force | The force exerted by a surface as an object moves across it or makes an effort to move across it |
air resistance | a special type of force that acts upon on an object as they travel through the air |
spring force | a contact force exerted on an object by a string when it is stretches or suppressed |
thrust | a contact force that is exerted in the opposite direction of an exhaust gas being expelled |