Forces Review (From Textbook)
 1. Friction is present whenever surfaces _________A) touchB) break openC) look like simple machinesD) are smooth2. Objects weigh more on Earth than they do the _________A) oceanB) Milky WayC) sunD) moon3. The force on a magnet is called __________________A) supernatural forceB) magnetic forceC) magnetoD) kryptonite4. Forces that act on an object but cancel each other out are called ___________A) air forcesB) balanced forcesC) force fieldsD) unbalanced forces5. Ships made of steel are still able to floatA) TrueB) false6. Levers have _________ partsA) oneB) fourC) twoD) three7. An inclined plane allows you to use ___________ force over a distance to make work easierA) lessB) 2 times as muchC) NoD) more8. Which simple machine does a flagpole make use of?A) screwB) inclined planeC) leverD) pulley9. Which simple machine makes up a pencil sharpener? (the one mounted on the wall)A) lawn tractorB) inclined planeC) pulleyD) wheel and axle10. Machines reduce the amount of work needed to do a jobA) TrueB) False11. A knife and chisel are both ____________A) inclined planesB) screwsC) wedgesD) pulleys12. What causes a ship to float in water?A) fishB) AquamanC) magnetic forceD) buoyant force13. Which simple machine is part of a screw?A) pulleyB) fulcrumC) wheel and axleD) inclined plane14. Work uses force to move an object through a _________A) magnetic fieldB) wallC) pulleyD) distance15. A ____________ is an example of a simple machine called an inclined planeA) flagpoleB) carC) rampD) pencil sharpener
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