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- 1. Multiple ChoiceWhich of the following is a requirement for work to be done?Force is exerted.Object is carried.Force moves an object.Machine is used.
- 2. Multiple ChoiceA painter lifts a can of paint that weighs 48 Newtons a distance of 3 meters. How would you calculate how much work he does? (work = distance x force)3m ÷ 48N48N ÷ 3m48N × 3mnone of the above
- 3. Multiple ChoiceWhich is an example of how a simple machine changes the direction of a force?using a rope to pull a box up a hillusing a rope and pulley to raise a flagusing a slide to push a box down stepsusing an axle and wheel to make a wagon move forward
- 4. Multiple ChoiceWhat causes the efficiency of a machine to be less than 100%?frictiongravityinput forcereaction force
- 5. Multiple ChoiceWhich is a simple machine?baseball batbicyclecan openercar
- 6. Multiple ChoiceWhich of the following is a form of the inclined plane?pulleyscrewwheel and axlelever
- 7. Multiple ChoiceWhich simple machine would most likely increase the distance and reduce the force needed for a rolling cart to be moved up three steps?leverscrewpulleyinclined plane
- 8. Multiple ChoiceThe mechanical advantage available from a pulley could best help in which situation?pushing a carrotating a wheelflying an airplanelifting an elevator
- 9. Multiple ChoiceWhich statement correctly explains a compound machine?A compound machine is made up of one or more simple machinesA compound machine is made up of two or more simple machines.A screw is a type of inclined plane.None of the above
- 10. Multiple Choice
The greatest amount of force is required to move the metal block up which inclined plane?ABCD - 11. Multiple ChoiceA log splitting machine was invented to split logs quickly. A motor powers a metal piece that is pushed through the middle of a log. The metal piece used to split a log is an example of what simple machine?wedgepulleyscrewlever
- 12. Multiple ChoiceThe table shows the force applied and displacement when different boxes are being pushed. Which box shows the most work being done?WXYZ
- 13. Multiple ChoiceThe picture shows a student using a pulley system to raise a flag. Which statement correctly describes the function of this system?The more force used to pull the string, the more string will be needed to raise the flag.The more force used to pull the string, the faster the flag will move up the flagpole.The less force used to pull the string, the greater the distance the flag will move.The less force used to pull the string, the longer the flag will remain raised.
- 14. Multiple ChoiceThe illustration shows a person removing the lid from a crate with a crowbar. Which statement describes the force on the crowbar and the motion of the lid?As the crowbar is pushed down, the lid moves down.As the crowbar is pushed down, the lid moves up.As the crowbar is pulled up, the lid moves down.As the crowbar is pulled out, the lid moves up.
- 15. Multiple ChoiceThe picture shows the inside of a watch. This watch uses both a battery and a simple machine to measure time. The arrow points to the simple machine inside the watch. What simple machine helps make the watch measure time?a wheel and axlean inclined planea screwa lever
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