Balanced & Unbalanced Forces, Simple Machines, & Energy Transformations
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 affects gravitational potential energy? | An object's height and weight
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| How can you increase the gravitational potential energy of an object? | Increasing the height and/or weight will increase the gravitational potential energy
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| What is kinetic energy? | Kinetic energy is the energy of motion
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| What affects the kinetic energy of an object? | An object's speed and mass
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| How can you increase an object's kinetic energy? | Increasing the speed and/or mass will increase an object's kinetic energy
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| What is an energy transformation? | When energy changes from one form to another
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| What energy transformation takes place in solar panels? | radiant energy to electric energy
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| What causes a resting object to move? | unbalanced forces change an object's motion; net force is not equal to zero
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| What results from balanced forces? | Balanced forces cause no change in motion; net force is equal to zero
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| What is net force? | Net force is the sum of all objects acting on an object
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| What happens when unbalanced forces act on an object? | the object moves in the direction of the greater force
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| What are simple machines? | Simple machines make work seem easier
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| How do simple machines affect work? | Simple machines change the amount, direction, or distance of the effort force
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| What is mechanical advantage? | A simple machine's mechanical advantage measures how much the machine affects the force needed to do work. It measures the benefit of using the machine.
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| How do you increase an inclined plane's mechanical advantage? | Make the ramp longer and less steep
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| How do you make a pulley system most beneficial? | A system with more pulleys and longer ropes has the greatest mechanical advantage
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| How does one pulley affect work? | One pulley changes the direction of the force
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| What happens to force as the length of a ramp increases? | The force needed to do work will decrease when the ramp length increases
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| Does it require less force to lift an object straight up or pushing/pulling a load up a ramp? | Less force is needed to push or pull an object up a ramp
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| What is the law of conservation of energy? | This law states that energy cannot be created or destroyed; it only changes form
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| What energy transformation occurs in a battery-powered laptop? | chemical PE to electric KE to light and sound KE
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| What energy transformation occurs when an electric fan is used? | electric KE to mechanical and sound KE
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| What is the speed of an object moving 50 miles in 10 hours? | speed = distance/time
speed = 5 miles per hour
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You may also shuffle the rows of the table by clicking on the "Shuffle" button.
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Created by:
marybuchholz
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