Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 186 · 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.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) only on Mondays (d) no, work stays the same
2. 2.🏋️ A force of 150 N pushes a cart 4 m along the floor. How much work is done, in joules?
3. 3.🏋️ A force of 200 N did 1200 J of work. How many metres did the object move?
4. 4.🏋️ A force of 120 N did 1200 J of work. How many metres did the object move?
5. 5.🏋️ A force of 460 N pushes a cart 8 m along the floor. How much work is done, in joules?
6. 6.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
7. 7.🏋️ A 9 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
8. 8.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) newton (N) (d) joule (J)
9. 9.🏋️ Pushing a crate 10 m took 4000 J of work. What force was used, in newtons?
10. 10.🏋️ A 1 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
11. 11.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load ÷ effort (d) load × effort
12. 12.🏋️ 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?
13. 13.🏋️ A force of 480 N pushes a cart 7 m along the floor. How much work is done, in joules?
14. 14.🏋️ A longer ramp to the same height needs … (a) the same effort (b) less effort (c) no effort (d) more effort
15. 15.🏋️ A 14 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
16. 16.🏋️ Work is done when a force moves something … (a) through a distance (b) very slowly (c) without moving it (d) only upwards
17. 17.🏋️ A force of 70 N did 210 J of work. How many metres did the object move?
18. 18.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1650 N box up it, in newtons? (ideal ramp, no friction)
19. 19.🏋️ A force of 240 N did 960 J of work. How many metres did the object move?
20. 20.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
21. 21.🏋️ A machine lifts a load of 240 N when you push with 120 N. What is its mechanical advantage (MA)?
22. 22.🏋️ Pushing a crate 2 m took 700 J of work. What force was used, in newtons?
23. 23.🏋️ An 11 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
24. 24.🏋️ A machine lifts a load of 40 N when you push with 10 N. What is its mechanical advantage (MA)?
25. 25.🏋️ A force of 490 N did 3920 J of work. How many metres did the object move?
26. 26.🏋️ A force of 70 N pushes a cart 2 m along the floor. How much work is done, in joules?
27. 27.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 4750 N box up it, in newtons? (ideal ramp, no friction)
28. 28.🏋️ A force of 90 N did 360 J of work. How many metres did the object move?
29. 29.🏋️ Pushing a crate 2 m took 420 J of work. What force was used, in newtons?
30. 30.🏋️ A force of 40 N did 400 J of work. How many metres did the object move?
31. 31.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
32. 32.🏋️ Pushing a crate 3 m took 660 J of work. What force was used, in newtons?
33. 33.🏋️ A force of 470 N did 4230 J of work. How many metres did the object move?
34. 34.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 4800 N box up it, in newtons? (ideal ramp, no friction)
35. 35.🏋️ 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?
36. 36.🏋️ A force of 370 N pushes a cart 8 m along the floor. How much work is done, in joules?
37. 37.🏋️ A force of 370 N pushes a cart 9 m along the floor. How much work is done, in joules?
38. 38.🏋️ Pushing a crate 2 m took 820 J of work. What force was used, in newtons?
39. 39.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
40. 40.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)

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