Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 561 · 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 machine lifts a load of 320 N when you push with 160 N. What is its mechanical advantage (MA)?
2. 2.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) watt hour (d) joule (J)
3. 3.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load × effort (c) effort ÷ load (d) load + effort
4. 4.🏋️ A force of 470 N pushes a cart 9 m along the floor. How much work is done, in joules?
5. 5.🏋️ A force of 230 N pushes a cart 7 m along the floor. How much work is done, in joules?
6. 6.🏋️ An 11 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
7. 7.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
8. 8.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) through a distance (d) very slowly
9. 9.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2600 N box up it, in newtons? (ideal ramp, no friction)
10. 10.🏋️ A force of 60 N did 480 J of work. How many metres did the object move?
11. 11.🏋️ Pushing a crate 8 m took 560 J of work. What force was used, in newtons?
12. 12.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
13. 13.🏋️ A force of 210 N pushes a cart 4 m along the floor. How much work is done, in joules?
14. 14.🏋️ A machine lifts a load of 500 N when you push with 100 N. What is its mechanical advantage (MA)?
15. 15.🏋️ A force of 250 N did 250 J of work. How many metres did the object move?
16. 16.🏋️ 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?
17. 17.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) no, work stays the same (c) yes, always (d) yes, by half
18. 18.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
19. 19.🏋️ A force of 90 N pushes a cart 8 m along the floor. How much work is done, in joules?
20. 20.🏋️ A force of 440 N pushes a cart 4 m along the floor. How much work is done, in joules?
21. 21.🏋️ A machine lifts a load of 380 N when you push with 190 N. What is its mechanical advantage (MA)?
22. 22.🏋️ Pushing a crate 9 m took 2520 J of work. What force was used, in newtons?
23. 23.🏋️ A force of 220 N did 880 J of work. How many metres did the object move?
24. 24.🏋️ A longer ramp to the same height needs … (a) less effort (b) more effort (c) the same effort (d) no effort
25. 25.🏋️ A force of 140 N pushes a cart 4 m along the floor. How much work is done, in joules?
26. 26.🏋️ Pushing a crate 5 m took 1300 J of work. What force was used, in newtons?
27. 27.🏋️ Pushing a crate 8 m took 160 J of work. What force was used, in newtons?
28. 28.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
29. 29.🏋️ A machine lifts a load of 450 N when you push with 150 N. What is its mechanical advantage (MA)?
30. 30.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 2750 N box up it, in newtons? (ideal ramp, no friction)
31. 31.🏋️ A 16 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
32. 32.🏋️ 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?
33. 33.🏋️ A force of 100 N did 900 J of work. How many metres did the object move?
34. 34.🏋️ A 14 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
35. 35.🏋️ Pushing a crate 3 m took 930 J of work. What force was used, in newtons?
36. 36.🏋️ 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?
37. 37.🏋️ A force of 40 N pushes a cart 4 m along the floor. How much work is done, in joules?
38. 38.🏋️ A force of 30 N did 240 J of work. How many metres did the object move?
39. 39.🏋️ A force of 380 N did 3800 J of work. How many metres did the object move?
40. 40.🏋️ A machine lifts a load of 50 N when you push with 10 N. What is its mechanical advantage (MA)?

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