Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 89 · 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.🏋️ Pushing a crate 7 m took 420 J of work. What force was used, in newtons?
2. 2.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load + effort (d) load ÷ effort
3. 3.🏋️ 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?
4. 4.🏋️ Pushing a crate 3 m took 1230 J of work. What force was used, in newtons?
5. 5.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) newton (N) (d) joule (J)
6. 6.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) only upwards (d) very slowly
7. 7.🏋️ A force of 40 N pushes a cart 8 m along the floor. How much work is done, in joules?
8. 8.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 4250 N box up it, in newtons? (ideal ramp, no friction)
9. 9.🏋️ 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
10. 10.🏋️ A force of 130 N pushes a cart 3 m along the floor. How much work is done, in joules?
11. 11.🏋️ A longer ramp to the same height needs … (a) the same effort (b) no effort (c) less effort (d) more effort
12. 12.🏋️ A force of 340 N did 340 J of work. How many metres did the object move?
13. 13.🏋️ A 15 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
14. 14.🏋️ Pushing a crate 5 m took 1050 J of work. What force was used, in newtons?
15. 15.🏋️ A force of 300 N pushes a cart 8 m along the floor. How much work is done, in joules?
16. 16.🏋️ A 12 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
17. 17.🏋️ A machine lifts a load of 220 N when you push with 110 N. What is its mechanical advantage (MA)?
18. 18.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
19. 19.🏋️ 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?
20. 20.🏋️ A force of 270 N pushes a cart 4 m along the floor. How much work is done, in joules?
21. 21.🏋️ 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?
22. 22.🏋️ A force of 120 N did 480 J of work. How many metres did the object move?
23. 23.🏋️ Pushing a crate 10 m took 500 J of work. What force was used, in newtons?
24. 24.🏋️ A force of 370 N pushes a cart 4 m along the floor. How much work is done, in joules?
25. 25.🏋️ A force of 260 N pushes a cart 9 m along the floor. How much work is done, in joules?
26. 26.🏋️ A machine lifts a load of 400 N when you push with 80 N. What is its mechanical advantage (MA)?
27. 27.🏋️ A force of 30 N pushes a cart 1 m along the floor. How much work is done, in joules?
28. 28.🏋️ A machine lifts a load of 120 N when you push with 60 N. What is its mechanical advantage (MA)?
29. 29.🏋️ A force of 100 N pushes a cart 4 m along the floor. How much work is done, in joules?
30. 30.🏋️ A machine lifts a load of 800 N when you push with 160 N. What is its mechanical advantage (MA)?
31. 31.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
32. 32.🏋️ A force of 420 N pushes a cart 6 m along the floor. How much work is done, in joules?
33. 33.🏋️ A machine lifts a load of 80 N when you push with 20 N. What is its mechanical advantage (MA)?
34. 34.🏋️ A force of 100 N did 1000 J of work. How many metres did the object move?
35. 35.🏋️ A force of 140 N did 140 J of work. How many metres did the object move?
36. 36.🏋️ 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?
37. 37.🏋️ An 8 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
38. 38.🏋️ A force of 410 N did 2870 J of work. How many metres did the object move?
39. 39.🏋️ A machine lifts a load of 40 N when you push with 10 N. What is its mechanical advantage (MA)?
40. 40.🏋️ 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?

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