Science Vocab for Chapter 19
Terms
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- change in velocity divided by the amount of time needed for the change to occur.
- acceleration
- rate of motion calculated by dividing the distance traveled by the amount of time it takes to travel that distance
- average speed
- speed of an object at any given time.
- instantaneous speed
- speed of an object and its direction of motion
- velocity
- a push or a pull
- force
- force that resists motion between two touching surfaces and always acts opposite to the direction of motion
- friction
- tendency to resist a change in motion
- inertia
- a combination of simple machines.
- compound machine
- a sloped surface
- inclined plane
- a rod or plank that pivots about a fixed point.
- lever
- number of times a machine multiplies the effort force you apply to it.
- mechanical advantage
- an object with a groove, like a wheel, with a rope or chain running through the groove.
- pulley
- device that makes work easier with only one movement
- simple machine
- done when an applied force causes an object to move in the direction of the force.
- work