Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 911 · 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.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) newton (N) (d) joule (J)
2. 2.🏋️ 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?
3. 3.🏋️ Pushing a crate 8 m took 2720 J of work. What force was used, in newtons?
4. 4.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, always (c) no, work stays the same (d) yes, by half
5. 5.🏋️ Pushing a crate 4 m took 440 J of work. What force was used, in newtons?
6. 6.🏋️ A force of 330 N pushes a cart 10 m along the floor. How much work is done, in joules?
7. 7.🏋️ A 19 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
8. 8.🏋️ 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?
9. 9.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 700 N box up it, in newtons? (ideal ramp, no friction)
10. 10.🏋️ A machine lifts a load of 950 N when you push with 190 N. What is its mechanical advantage (MA)?
11. 11.🏋️ A force of 500 N pushes a cart 3 m along the floor. How much work is done, in joules?
12. 12.🏋️ A machine lifts a load of 140 N when you push with 70 N. What is its mechanical advantage (MA)?
13. 13.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load ÷ effort (d) load × effort
14. 14.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
15. 15.🏋️ A 3 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
16. 16.🏋️ A force of 10 N did 10 J of work. How many metres did the object move?
17. 17.🏋️ A force of 230 N pushes a cart 3 m along the floor. How much work is done, in joules?
18. 18.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 5000 N box up it, in newtons? (ideal ramp, no friction)
19. 19.🏋️ A force of 400 N did 2400 J of work. How many metres did the object move?
20. 20.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 5700 N box up it, in newtons? (ideal ramp, no friction)
21. 21.🏋️ 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?
22. 22.🏋️ A 10 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
23. 23.🏋️ A force of 430 N did 4300 J of work. How many metres did the object move?
24. 24.🏋️ A force of 30 N pushes a cart 1 m along the floor. How much work is done, in joules?
25. 25.🏋️ A force of 10 N did 70 J of work. How many metres did the object move?
26. 26.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
27. 27.🏋️ A machine lifts a load of 600 N when you push with 120 N. What is its mechanical advantage (MA)?
28. 28.🏋️ A force of 140 N did 1120 J of work. How many metres did the object move?
29. 29.🏋️ A machine lifts a load of 40 N when you push with 10 N. What is its mechanical advantage (MA)?
30. 30.🏋️ A force of 140 N pushes a cart 10 m along the floor. How much work is done, in joules?
31. 31.🏋️ A force of 500 N pushes a cart 6 m along the floor. How much work is done, in joules?
32. 32.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
33. 33.🏋️ A force of 70 N pushes a cart 10 m along the floor. How much work is done, in joules?
34. 34.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 3750 N box up it, in newtons? (ideal ramp, no friction)
35. 35.🏋️ A machine lifts a load of 760 N when you push with 190 N. What is its mechanical advantage (MA)?
36. 36.🏋️ A force of 270 N did 1350 J of work. How many metres did the object move?
37. 37.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) very slowly (d) through a distance
38. 38.🏋️ Pushing a crate 7 m took 3500 J of work. What force was used, in newtons?
39. 39.🏋️ A force of 340 N did 2380 J of work. How many metres did the object move?
40. 40.🏋️ Pushing a crate 5 m took 2450 J of work. What force was used, in newtons?

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