Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 717 · 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 13 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
2. 2.🏋️ Pushing a crate 4 m took 1520 J of work. What force was used, in newtons?
3. 3.🏋️ Pushing a crate 9 m took 4140 J of work. What force was used, in newtons?
4. 4.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) no, work stays the same (c) only on Mondays (d) yes, always
5. 5.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
6. 6.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
7. 7.🏋️ A force of 90 N did 540 J of work. How many metres did the object move?
8. 8.🏋️ An 11 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
9. 9.🏋️ A force of 110 N pushes a cart 5 m along the floor. How much work is done, in joules?
10. 10.🏋️ An 18 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
11. 11.🏋️ Pushing a crate 3 m took 1260 J of work. What force was used, in newtons?
12. 12.🏋️ A 15 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
13. 13.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load + effort (d) load ÷ effort
14. 14.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
15. 15.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
16. 16.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
17. 17.🏋️ A longer ramp to the same height needs … (a) less effort (b) the same effort (c) more effort (d) no effort
18. 18.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) newton (N) (d) watt hour
19. 19.🏋️ A force of 180 N did 1440 J of work. How many metres did the object move?
20. 20.🏋️ A machine lifts a load of 360 N when you push with 120 N. What is its mechanical advantage (MA)?
21. 21.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1700 N box up it, in newtons? (ideal ramp, no friction)
22. 22.🏋️ A 4 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
23. 23.🏋️ A 7 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
24. 24.🏋️ Pushing a crate 10 m took 300 J of work. What force was used, in newtons?
25. 25.🏋️ A machine lifts a load of 480 N when you push with 160 N. What is its mechanical advantage (MA)?
26. 26.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
27. 27.🏋️ A force of 210 N pushes a cart 9 m along the floor. How much work is done, in joules?
28. 28.🏋️ A force of 250 N pushes a cart 6 m along the floor. How much work is done, in joules?
29. 29.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
30. 30.🏋️ A machine lifts a load of 100 N when you push with 20 N. What is its mechanical advantage (MA)?
31. 31.🏋️ Pushing a crate 1 m took 270 J of work. What force was used, in newtons?
32. 32.🏋️ Pushing a crate 2 m took 900 J of work. What force was used, in newtons?
33. 33.🏋️ Pushing a crate 4 m took 880 J of work. What force was used, in newtons?
34. 34.🏋️ A 7 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
35. 35.🏋️ A force of 470 N did 4230 J of work. How many metres did the object move?
36. 36.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) only upwards (d) through a distance
37. 37.🏋️ Pushing a crate 7 m took 560 J of work. What force was used, in newtons?
38. 38.🏋️ A machine lifts a load of 840 N when you push with 140 N. What is its mechanical advantage (MA)?
39. 39.🏋️ A force of 50 N pushes a cart 7 m along the floor. How much work is done, in joules?
40. 40.🏋️ A 10 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

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