Unit B — Systems in Action
Unit Support
Line Master
B-5
Name:
...
Physics, 22.04.2021 01:00 moorega2100
Unit B — Systems in Action
Unit Support
Line Master
B-5
Name:
Mechanical Advantage
Part A
1. List three examples of machines with a mechanical advantage > 1.
(a)
(b)
(c)
2. List three examples of machines with a mechanical advantage < 1.
(a)
(b)
(c)
3. Give an example of a machine with a mechanical advantage = 1.
Answers: 2
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(a) assume the equation x = at^3 + bt describes the motion of a particular object, with x having the dimension of length and t having the dimension of time. determine the dimensions of the constants a and b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.) (b) determine the dimensions of the derivative dx/dt = 3at^2 + b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.)
Answers: 1
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This energy transformation diagram represents the energy of a skateboarder moving along a half-pipe. as she skates toward the top of the half-pipe, her original kinetic energy is converted to potential energy and friction. how much of the energy is potential?
Answers: 3
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Arailroad car collides with and sticks to an identical railroad car that is initially at rest. after the collision, the total kinetic energy of the two cars is a) the same as before. b) half as much as before. c) one third as much as before. d) one fourth as much as before. e) twice as much as before.
Answers: 1
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