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Stack #24887
Question | Answer |
---|---|
What causes motion? | Force |
What is motion? | Change in position from one place to another |
A force must be applied in order to get? | Motion |
Not all forces cause | motion |
How fast something moves is its | speed |
The force that pulls us to Earth is | gravity |
What is work? | The measure of force it takes to move an object |
These things are work | walking, pushing open a door, moving a box |
What are Simple Machines | A tool that helps people do work. |
Six Simple Machines | Wedge,inclined plane, wheel and axel, pulley, lever, screw. |
How fast an object moves from one position to another | speed |
A flat surfact set at an angle to another surface | inclined plane |
A change in position | motion |
A force that pulls all objects toward each other | gravity |
A tool that helps people do work | simple machine |
A bar that moves on or around a fixed point | lever |
A push or a pull | force |
A measure of the pull of gravity on an object | weight |
Measure of a force moving an object | work |
Your push on the truck is a | force |
The length of the ramp is the _______ the truck must move | distance |
The distance the truck moves divided by the time it takes is the truck's | speed |
The simple machine the truck is moving up is an | inclined plane |
The force to push the truck times the distance the truck moves is the _______done to push the truck up the ramp. | work |
A rock sat on the edge of a cliff. One day the rock fell off. The force that caused this motion was probably. | A. energy B. a pulley C. work D. gravity |
Wrokers at an airport put suitcases on an airplane. They use a moving ramp. What kind of simple machine is it? | F. an inclined plane G. a screw H. a wedge I. a pulley |
A jet flies at 550 mph. This is a measure of | A. height B. speed C. Fuel D. weight |