What is the scalar quantity that measures the distance traveled per unit time?
Matter and Energy - Semester Test

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Science
•
9th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
Speed
2.
FLASHCARD QUESTION
Front
What class of lever is used when the input force is applied between the fulcrum and the output force?
Back
Class 3 lever
3.
FLASHCARD QUESTION
Front
What is the SI unit of work?
Back
Joule
4.
FLASHCARD QUESTION
Front
How do you calculate the efficiency of a machine?
Back
Efficiency = (Work Output / Work Input) x 100%
5.
FLASHCARD QUESTION
Front
What force opposes the relative motion of two surfaces in contact?
Back
Friction
6.
FLASHCARD QUESTION
Front
What is the definition of energy?
Back
The capacity to do work.
7.
FLASHCARD QUESTION
Front
What is the difference between speed and velocity?
Back
Speed is a scalar quantity (magnitude only), while velocity is a vector quantity (magnitude and direction).
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