Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 691 · 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) newton (N) (b) joule (J) (c) watt hour (d) metre (m)
2. 2.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3200 N box up it, in newtons? (ideal ramp, no friction)
3. 3.🏋️ A force of 140 N pushes a cart 3 m along the floor. How much work is done, in joules?
4. 4.🏋️ Pushing a crate 5 m took 1800 J of work. What force was used, in newtons?
5. 5.🏋️ An 18 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
6. 6.🏋️ A longer ramp to the same height needs … (a) less effort (b) more effort (c) the same effort (d) no effort
7. 7.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
8. 8.🏋️ A force of 320 N did 1600 J of work. How many metres did the object move?
9. 9.🏋️ A force of 140 N pushes a cart 4 m along the floor. How much work is done, in joules?
10. 10.🏋️ 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)
11. 11.🏋️ 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)
12. 12.🏋️ A force of 370 N pushes a cart 10 m along the floor. How much work is done, in joules?
13. 13.🏋️ A force of 430 N did 1290 J of work. How many metres did the object move?
14. 14.🏋️ A 15 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.🏋️ An 18 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
16. 16.🏋️ Work is done when a force moves something … (a) through a distance (b) very slowly (c) without moving it (d) only upwards
17. 17.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load × effort (d) load ÷ effort
18. 18.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) only on Mondays (c) yes, always (d) no, work stays the same
19. 19.🏋️ 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?
20. 20.🏋️ Pushing a crate 7 m took 2450 J of work. What force was used, in newtons?
21. 21.🏋️ A force of 470 N pushes a cart 8 m along the floor. How much work is done, in joules?
22. 22.🏋️ A force of 40 N pushes a cart 3 m along the floor. How much work is done, in joules?
23. 23.🏋️ A force of 350 N pushes a cart 3 m along the floor. How much work is done, in joules?
24. 24.🏋️ A force of 80 N pushes a cart 5 m along the floor. How much work is done, in joules?
25. 25.🏋️ Pushing a crate 10 m took 1700 J of work. What force was used, in newtons?
26. 26.🏋️ A 2 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
27. 27.🏋️ A machine lifts a load of 950 N when you push with 190 N. What is its mechanical advantage (MA)?
28. 28.🏋️ A force of 110 N pushes a cart 8 m along the floor. How much work is done, in joules?
29. 29.🏋️ A force of 330 N pushes a cart 7 m along the floor. How much work is done, in joules?
30. 30.🏋️ A force of 350 N did 350 J of work. How many metres did the object move?
31. 31.🏋️ A force of 240 N pushes a cart 9 m along the floor. How much work is done, in joules?
32. 32.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3400 N box up it, in newtons? (ideal ramp, no friction)
33. 33.🏋️ A machine lifts a load of 390 N when you push with 130 N. What is its mechanical advantage (MA)?
34. 34.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
35. 35.🏋️ A force of 20 N did 200 J of work. How many metres did the object move?
36. 36.🏋️ A force of 60 N did 300 J of work. How many metres did the object move?
37. 37.🏋️ A force of 350 N did 1750 J of work. How many metres did the object move?
38. 38.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
39. 39.🏋️ A force of 280 N pushes a cart 8 m along the floor. How much work is done, in joules?
40. 40.🏋️ A force of 440 N pushes a cart 4 m along the floor. How much work is done, in joules?

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