Motion & Simple Machines 2: Question Preview (ID: 4589)


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The harder you pedal a bicycle, the faster it will go. What explains this?
a) Newton's 1st law of motion b) Newton's 2nd law of motion c) Newton's 3rd law of motion d) law of conservation of energy
A hockey puck will slide across ice for a long time when hit. What explains this?
a) Newton's 1st law of motion b) Newton's 2nd law of motion c) Newton's 3rd law of motion d) law of conservation of energy
The main reason a person can jump off the ground.
a) Newton's 1st law of motion b) Newton's 2nd law of motion c) Newton's 3rd law of motion d) law of conservation of energy
Your front teeth are an example of this simple machine.
a) pulley b) lever c) screw d) wedge
A cord on a widow blind is an example of this simple machine.
a) pulley b) lever c) screw d) wedge
A sloped surface, sometimes called a ramp, that allows you to lift a heavy load using less force over a greater distance is a(n) ___.
a) wedge b) lever c) wheel and axle d) inclined plane
The resistance of motion between two objects that are in contact with each other.
a) inertia b) friction c) weight d) gravity
The more ____ an object has, the greater its inertia.
a) mass b) height c) length d) width
______ equals force times distance.
a) Mass b) Work c) Friction d) Inertia
Which best relates the force exerted by the effort and the force exerted by the resistance in a 2nd class lever?
a) They both exert a force in the same direction on the fulcrum. b) They are added together to produce a larger total force. c) They act in opposite directions. d) They precisely balsnce each other when the lever is in motion.
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