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8th -Forces and Motion quiz Ch 1
Forces and Motion
8
Science
8th Grade
05/25/2010

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Cards

Term
If you knew a car traveled 300 km in
3 hr you can figure out its ______.
Definition
average speed
Term
When an objects distance from another object is changing, it is
Definition
in motion.
Term
The formula for speed is
Definition
S = d/t
speed equals distance divided by time
Term
The rate at which velocity changes is called
Definition
acceleration.
Term
Why do planets have acceleration?
Definition
They are always changing direction.
Term
The SI unit of acceleration is
Definition
meter per second per second
Term
Short answer: People living at the equator are traveling at a speed of 1670 km/h as the Earth spins on its axis. Are these people being accelerated?
Definition
Yes, The direction of the people at the equator is constantly changing.
Term
A roller coaster is moving 5m/s at the top of a hill and 60m/s at the bottom of the hill, five seconds later. Find the average acceleration of the roller coaster and then find the average acceleration.
Definition
Formula is A = end speed - start speed divided by time
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