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Formula Review for Chapters 11 - 13 (Motion, Forces, Work, Energy) |
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pg |
Formula |
Units |
Word Problem |
Solution |
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432 |
Work |
Joules |
1) How much work does a crane do if it uses a force of 5,200 Newtons to lift a girder 20 meters? |
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432 |
Work |
Joules |
2) How much work is done if you are able to move a 5kg rock 20m? |
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|
433 |
Power |
watts |
3) What is John's power output if he does 3,960 J of work in 120 seconds? |
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|
446 |
Potential Energy |
Joules |
4) What is the gravitational potential energy of a 1,200 kg car at the top of a hill that is 22 meters high? |
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|
463 |
Kinetic Energy |
Joules |
5) What is the kinetic energy of a 0.045 kg ball traveling at 4 m/s? |
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|
459 |
Efficiency = |
% |
6) Alice and Jim calculate that they must do 1,800 J of work to push a piano up a ramp. However, they actually end up doing 2,600 J of work. What is the efficiency of the ramp? |
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(lab) |
Acceleration |
m/s/s |
7) A ball bearing drops from 2 meters in 0.6442 seconds. What is its acceleration? |
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|
375 |
Acceleration |
m/s/s |
8) Natalie accelerates her skateboard along a straight path from 0m/s to 4.0 m/s in 4.5 s. Find her average acceleration. |
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|
369 |
Velocity |
m/s |
9) A ball bearing rolls across the floor for 4 meters in 3 seconds. What is its velocity? |
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|
401 |
Force |
Newtons |
10) A baseball that has a mass of 0.18kg accelerates downwards at 9.8 m/s/s. What is the gravitational force acting upon the baseball? |
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|
415 |
Momentum |
kg-m/s |
11) Calculate the momentum of a 70 kg speed skater moving forward at 16 m/s |
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