Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 354 · 40 questions

Engineer's tip (Less force, more distance): MA = load ÷ effort. Work (J) = force (N) × distance (m); force = work ÷ distance; distance = work ÷ force. Ideal ramp: MA = length ÷ height, effort = load ÷ MA.

1. 1.🏋️ A 10 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
2. 2.🏋️ A machine lifts a load of 210 N when you push with 70 N. What is its mechanical advantage (MA)?
3. 3.🏋️ A force of 270 N pushes a cart 3 m along the floor. How much work is done, in joules?
4. 4.🏋️ A machine lifts a load of 280 N when you push with 70 N. What is its mechanical advantage (MA)?
5. 5.🏋️ A force of 440 N pushes a cart 4 m along the floor. How much work is done, in joules?
6. 6.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 3250 N box up it, in newtons? (ideal ramp, no friction)
7. 7.🏋️ A force of 150 N pushes a cart 7 m along the floor. How much work is done, in joules?
8. 8.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, always (c) yes, by half (d) only on Mondays
9. 9.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) only upwards (d) very slowly
10. 10.🏋️ A force of 420 N did 1680 J of work. How many metres did the object move?
11. 11.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load ÷ effort (d) load × effort
12. 12.🏋️ A machine lifts a load of 150 N when you push with 50 N. What is its mechanical advantage (MA)?
13. 13.🏋️ Pushing a crate 4 m took 880 J of work. What force was used, in newtons?
14. 14.🏋️ A 7 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
15. 15.🏋️ A 2 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
16. 16.🏋️ A 5 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
17. 17.🏋️ A 9 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
18. 18.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1700 N box up it, in newtons? (ideal ramp, no friction)
19. 19.🏋️ A force of 30 N did 300 J of work. How many metres did the object move?
20. 20.🏋️ A 17 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
21. 21.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
22. 22.🏋️ A machine lifts a load of 780 N when you push with 130 N. What is its mechanical advantage (MA)?
23. 23.🏋️ A force of 150 N pushes a cart 5 m along the floor. How much work is done, in joules?
24. 24.🏋️ A 19 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
25. 25.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
26. 26.🏋️ A 7 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
27. 27.🏋️ A force of 230 N pushes a cart 10 m along the floor. How much work is done, in joules?
28. 28.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) newton (N) (d) joule (J)
29. 29.🏋️ A force of 20 N pushes a cart 1 m along the floor. How much work is done, in joules?
30. 30.🏋️ A force of 200 N pushes a cart 7 m along the floor. How much work is done, in joules?
31. 31.🏋️ A force of 200 N did 600 J of work. How many metres did the object move?
32. 32.🏋️ Pushing a crate 6 m took 120 J of work. What force was used, in newtons?
33. 33.🏋️ Pushing a crate 5 m took 700 J of work. What force was used, in newtons?
34. 34.🏋️ A force of 350 N did 1400 J of work. How many metres did the object move?
35. 35.🏋️ A machine lifts a load of 1140 N when you push with 190 N. What is its mechanical advantage (MA)?
36. 36.🏋️ A machine lifts a load of 400 N when you push with 80 N. What is its mechanical advantage (MA)?
37. 37.🏋️ Pushing a crate 10 m took 3400 J of work. What force was used, in newtons?
38. 38.🏋️ A force of 390 N did 3510 J of work. How many metres did the object move?
39. 39.🏋️ A force of 260 N pushes a cart 4 m along the floor. How much work is done, in joules?
40. 40.🏋️ Pushing a crate 7 m took 1750 J of work. What force was used, in newtons?

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