• Shuffle
Toggle On
Toggle Off
• Alphabetize
Toggle On
Toggle Off
• Front First
Toggle On
Toggle Off
• Both Sides
Toggle On
Toggle Off
Toggle On
Toggle Off
Front

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

Play button

Play button

Progress

1/31

Click to flip

31 Cards in this Set

• Front
• Back
 Large dams on rivers are an example of what source of energy? Potential energy What does kinetic energy allow you to do? Knock over pins with a bowling bowl. How does the body's potential energy allow us to throw a ball? The body changes stored energy into kinetic energy. What are some examples of simple machines? Wedges and pulleys Why do people walking on a wet surface sometimes slip? The water reduces the friction between the foot and the surface. What will oiling the chain of a bicycle do? Increase efficiency What causes a rolling bowling ball to stay in motion? inertia Energy is needed to do what? work What is an example of mechanical energy? an unwinding rubber band Kinetic energy is the energy of what? motion What lowers the efficiency of a machine? friction What makes work easier and has one or two moving parts? simple machine What is an example of something that has the most potential energy? an elevator stopped on the 7th floor When does a ball dropped from the top of the school have the most kinetic energy? just before it hits the ground When does a ball dropped from the top of the school have the most kinetic energy? just before it hits the ground Who developed the Law of Motion? Newton What simple machine would be most useful for lifting an object straight up into the air? pulley What simple machine would be most useful for loading the back of a truck? inclined plane The cutting edge of an ax is what type of simple machine? wedge If you want to stop a moving object, you must use what? force When you move a box, you do what? work A lever is made of a what? bar and fulcrum A skier who is standing still at the top of a mountain has what? potential energy When you use an inclined plane wrapped around a rod, you are using what? a screw What is make up of two or more simple machines? Compound machine What kind of force slows down two objects when the rub against each other? Friction __________ is the amount of work a machine does compared to the amount of energy put into using the machine. Efficiency The kind of energy stored in food is _________ energy. chemical What force pulls two objects together? Gravity A machine with many moving parts that usually has low efficiency is a complex machine High efficiency means a lot of work is done for the amount of ___________ being used. energy