Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 940 · 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 6 m took 2220 J of work. What force was used, in newtons?
2. 2.🏋️ A force of 260 N pushes a cart 9 m along the floor. How much work is done, in joules?
3. 3.🏋️ A machine lifts a load of 200 N when you push with 100 N. What is its mechanical advantage (MA)?
4. 4.🏋️ A 2 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
5. 5.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) less effort (d) the same effort
6. 6.🏋️ A machine lifts a load of 1080 N when you push with 180 N. What is its mechanical advantage (MA)?
7. 7.🏋️ A machine lifts a load of 520 N when you push with 130 N. What is its mechanical advantage (MA)?
8. 8.🏋️ 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
9. 9.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) watt hour (d) joule (J)
10. 10.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) load ÷ effort (d) effort ÷ load
11. 11.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 6000 N box up it, in newtons? (ideal ramp, no friction)
12. 12.🏋️ Pushing a crate 4 m took 840 J of work. What force was used, in newtons?
13. 13.🏋️ A force of 340 N did 680 J of work. How many metres did the object move?
14. 14.🏋️ An 11 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
15. 15.🏋️ A force of 180 N did 540 J of work. How many metres did the object move?
16. 16.🏋️ A force of 50 N did 100 J of work. How many metres did the object move?
17. 17.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
18. 18.🏋️ A force of 60 N pushes a cart 6 m along the floor. How much work is done, in joules?
19. 19.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) very slowly (d) through a distance
20. 20.🏋️ A force of 10 N did 40 J of work. How many metres did the object move?
21. 21.🏋️ A force of 70 N pushes a cart 10 m along the floor. How much work is done, in joules?
22. 22.🏋️ A machine lifts a load of 360 N when you push with 120 N. What is its mechanical advantage (MA)?
23. 23.🏋️ A force of 250 N pushes a cart 8 m along the floor. How much work is done, in joules?
24. 24.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
25. 25.🏋️ A machine lifts a load of 320 N when you push with 160 N. What is its mechanical advantage (MA)?
26. 26.🏋️ A force of 90 N pushes a cart 9 m along the floor. How much work is done, in joules?
27. 27.🏋️ A force of 440 N pushes a cart 4 m along the floor. How much work is done, in joules?
28. 28.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
29. 29.🏋️ Pushing a crate 6 m took 2100 J of work. What force was used, in newtons?
30. 30.🏋️ A force of 220 N pushes a cart 10 m along the floor. How much work is done, in joules?
31. 31.🏋️ A force of 370 N pushes a cart 8 m along the floor. How much work is done, in joules?
32. 32.🏋️ 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?
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 370 N pushes a cart 6 m along the floor. How much work is done, in joules?
35. 35.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
36. 36.🏋️ 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?
37. 37.🏋️ A 6 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
38. 38.🏋️ A 12 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
39. 39.🏋️ A machine lifts a load of 480 N when you push with 120 N. What is its mechanical advantage (MA)?
40. 40.🏋️ 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?

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