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- 1. Multiple ChoiceHow is work defined?the amount of energythe transfer of force over a distancerate of work in a given timethe change in distance in a given time
- 2. Multiple ChoiceWhat is the equation for force?F= mass × accelerationF = mass × distanceF= distance/timeF = mass/time
- 3. Multiple ChoiceWhat is the unit of measurement for work?NewtonsJoulesWattsMeters
- 4. Multiple ChoiceWhich of the following is an example of work being done?Teacher sitting in a chairBook resting on deskKeys hanging from a key chainA ball being rolled on the floor
- 5. Multiple ChoiceIf a student uses 10 Newtons of Force to push a chair 5 meters, how much is work is being done?2 Joules.5 Joules50 Joules20 Newtons
- 6. Multiple ChoiceIf a lion drags his prey 10 meters to his den doing 500 joules of work, how much force did he use?50 Newtons500 Joules50,000 Newtons10 Newtons
- 7. Multiple ChoiceIs this an example of work?
A teacher applies a force to a wall and becomes exhausted.TrueFalse - 8. Multiple ChoiceA machine's __________________ is the number of times the machine multiplies the input force.powerforcemechanical advantageefficiency
- 9. Multiple ChoiceHow much work is produced when 350 N is used to move a car 5 m (W=Fd)?70 J1750 J355 J175 J
- 10. Multiple Choice
What is effort (input) force?
the force one exerts on a machine
the force which an effort force must overcome in order to do work on an object via a simple machine.
the force the machine exerts on a object
the output work times the input distance
- 11. Multiple Choice
What is resistance (output) force?
the force required by a machine in order to accomplish work (the force you put on the machine)
The force that is exerted by a machine
the force the machine exerts on a object
the output work times the input distance
- 12. Multiple Choice
What is effort (input) distance?
the force required by a machine in order to accomplish work (the force you put on the machine)
the force which an effort force must overcome in order to do work on an object via a simple machine.
the distance an input force acts through
the output work times the input distance
- 13. Multiple Choice
What is resistance (output) distance?
the force required by a machine in order to accomplish work (the force you put on the machine)
the force which an effort force must overcome in order to do work on an object via a simple machine.
the distance an input force moves a machine
the distance through which the output force is exerted
- 14. Multiple Choice
Using a lever, Joe is able to lift a 10,000 N car off of the ground with a force of 1000 N. What is the mechanical advantage of the lever (MA=Output Force/Input Force)?
1
10
100
1000
- 15. Multiple Choice
The mechanical advantage of this inclined plane is...(MA=Resistance Force/Effort Force)
2.4
3.4
4.4
- 16. Multiple ChoiceJeff is a landscaping contractor and lifts a rock weighing 600 pounds by wedging a board under the rock. Jeff weighs 150 pounds and puts all of his weight on the lever. How much mechanical advantage did the lever provide to Jeff in lifting the rock?0248
- 17. Multiple ChoiceLamar Gant, U.S. powerlifting star, became the first man to deadlift five times his own body weight in 1985. Deadlifting involves raising a loaded barbell from the floor to a position above the head with outstretched arms. Determine the work done by Lamar in deadlifting 300 kg to a height of 0.90 m above the ground (W=Fd).270 J2646 J333 J3.00X10-3 J
- 18. Multiple ChoiceTo make this rock more more easily, should he move the fulcrum closer to himself?YesNo
- 19. Multiple ChoiceWhat is the mechanical advantage if you lift a load of 300 newtons and you only push down with 50 newtons?25050606
- 20. Multiple Choice
A wedge has an output force of 25 N when given an input force of 5 N. What's the wedge's mechanical advantage?
0.2
5
20
30
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