Practice Test ! :)| What is Mechanical Efficiency | Practice test | Practice test answers | Bibliography | 1) A 250N box is lifted through 8m on a lever. It takes 400N of force to move the same box 4m. What is the Mechanical Efficiency of this machine? 2) A 7000N boulder is pushed on an inclined plane for 12m to a height of 5m. the boulder weighs 10 000N. How much energy is wasted? 3) Mr. Stinson used a 25m piece of wood to lift a 385N box, 13m. the box weighs 495N. What is the Mechanical Efficiency of this machine? 4) A giant 3670N coin is rolled up a 47m incline plane to a height of 21m. The weight of the coin is 7980N. How much energy is wasted? 5) What does input force mean? What does output force mean? 6) Why is the efficiency of a machine never 100%?
1) A 250N box is lifted through 8m on a lever. It takes 400N of force to move the same box 4m. What is the Mechanical Efficiency of this machine?
2) A 7000N boulder is pushed on an inclined plane for 12m to a height of 5m. the boulder weighs 10 000N. How much energy is wasted?
3) Mr. Stinson used a 25m piece of wood to lift a 385N box, 13m. the box weighs 495N. What is the Mechanical Efficiency of this machine?
4) A giant 3670N coin is rolled up a 47m incline plane to a height of 21m. The weight of the coin is 7980N. How much energy is wasted?
5) What does input force mean? What does output force mean?
6) Why is the efficiency of a machine never 100%?
| What is Mechanical Efficiency | Practice Test | Practice Test Answers | Bibliography |