Determine whether each statement below is true or false.
Machines are devices that multiply or redirect forces.
Most electrical power in the U.S. comes from fossil fuels.
The sweet spot on a tennis racket is the place where the ball produces minimum vibrations in the racket.
The ratio of output force to input force is called mechanical advantage.
The ratio of force output to force input is called efficiency.
As an airplane gains altitude at a constant speed, its KE increases. Physics true and false energy and machines help!!! 10 points for right answer!!!!!!!!?
false
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