energy, work, power, simple machines
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What is energy? | The ability to move or change matter.
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| What is potential energy? | The energy of position.
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| What is kinetic energy? | The energy of motion.
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| What does the law of conservation of energy state? | Energy is neither created or destroyed.
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| What is renewable energy? | Energy that is always available.
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| What is an example of renewable energy? | Wind, radiant.
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| What is non-renewable energy? | Energy that cannot be re-used.
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| What is an example of non-renewable energy? | Fossil fuels.
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| What kind of energy do we get from food? | Chemical energy.
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| What kind of energy do we usually get from friction? | Thermal energy.
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| What is work? | The form of energy that comes from force applied over a distance.
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| What is the formula for work? | W=Fd
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| What is the unit of measure for work? | A joule.
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| What is power? | The rate at which work is done.
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| What is the formula for power? | P=W/t
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| What is the unit of measure for power? | A watt.
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| What is a machine? | A device with moving parts that work together to accomplish a task.
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| What is a simple machine? | An unpowered mechanical device that accomplishes a task with only 1 movement.
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| Name 5 simple machines. | Wheel and axle, rope and pulley, ramp, lever, gear.
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| How many classes of levers are there? | Three.
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| Describe a 1st class lever. | Fulcrum is between input and output forces.
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| Describe a 2nd class lever. | Fulcrum is at one end, input force is at the other end, and the output force is in the middle.
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| Describe a 3rd class lever. | Fulcrum is at one end, output force is at the other end, and the input force is in the middle.
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| What are 2 simple machines you use in your home to make your life easier? | Stairs, knife. etc.
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| What is meant by “mechanical advantage?” | The ratio of output force divided by the input force.
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Created by:
Ms. Tinkham
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