Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 211 · 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 15 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
2. 2.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, by half (c) only on Mondays (d) yes, always
3. 3.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
4. 4.🏋️ A force of 60 N did 540 J of work. How many metres did the object move?
5. 5.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) watt hour (d) newton (N)
6. 6.🏋️ Pushing a crate 2 m took 180 J of work. What force was used, in newtons?
7. 7.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 100 N box up it, in newtons? (ideal ramp, no friction)
8. 8.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) effort ÷ load (c) load × effort (d) load + effort
9. 9.🏋️ A force of 440 N pushes a cart 6 m along the floor. How much work is done, in joules?
10. 10.🏋️ Pushing a crate 3 m took 960 J of work. What force was used, in newtons?
11. 11.🏋️ A machine lifts a load of 240 N when you push with 40 N. What is its mechanical advantage (MA)?
12. 12.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) very slowly (d) through a distance
13. 13.🏋️ A 6 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
14. 14.🏋️ A force of 100 N did 700 J of work. How many metres did the object move?
15. 15.🏋️ A machine lifts a load of 960 N when you push with 160 N. What is its mechanical advantage (MA)?
16. 16.🏋️ A force of 330 N pushes a cart 8 m along the floor. How much work is done, in joules?
17. 17.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
18. 18.🏋️ A 20 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
19. 19.🏋️ A machine lifts a load of 120 N when you push with 20 N. What is its mechanical advantage (MA)?
20. 20.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1300 N box up it, in newtons? (ideal ramp, no friction)
21. 21.🏋️ A longer ramp to the same height needs … (a) the same effort (b) less effort (c) more effort (d) no effort
22. 22.🏋️ Pushing a crate 4 m took 920 J of work. What force was used, in newtons?
23. 23.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2550 N box up it, in newtons? (ideal ramp, no friction)
24. 24.🏋️ 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)
25. 25.🏋️ A force of 400 N pushes a cart 4 m along the floor. How much work is done, in joules?
26. 26.🏋️ A force of 370 N did 2220 J of work. How many metres did the object move?
27. 27.🏋️ A 5 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
28. 28.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
29. 29.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3800 N box up it, in newtons? (ideal ramp, no friction)
30. 30.🏋️ A force of 340 N did 1360 J of work. How many metres did the object move?
31. 31.🏋️ A force of 100 N pushes a cart 1 m along the floor. How much work is done, in joules?
32. 32.🏋️ A 9 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
33. 33.🏋️ Pushing a crate 3 m took 1320 J of work. What force was used, in newtons?
34. 34.🏋️ A 17 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 3 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
36. 36.🏋️ Pushing a crate 1 m took 430 J of work. What force was used, in newtons?
37. 37.🏋️ A force of 140 N did 700 J of work. How many metres did the object move?
38. 38.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 4250 N box up it, in newtons? (ideal ramp, no friction)
39. 39.🏋️ Pushing a crate 7 m took 2450 J of work. What force was used, in newtons?
40. 40.🏋️ Pushing a crate 9 m took 990 J of work. What force was used, in newtons?

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