Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 969 · 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 longer ramp to the same height needs … (a) the same effort (b) no effort (c) less effort (d) more effort
2. 2.🏋️ A machine lifts a load of 80 N when you push with 20 N. What is its mechanical advantage (MA)?
3. 3.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load × effort (d) load ÷ effort
4. 4.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) no, work stays the same (c) only on Mondays (d) yes, always
5. 5.🏋️ Pushing a crate 2 m took 880 J of work. What force was used, in newtons?
6. 6.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) very slowly (d) through a distance
7. 7.🏋️ A machine lifts a load of 780 N when you push with 130 N. What is its mechanical advantage (MA)?
8. 8.🏋️ A force of 370 N did 370 J of work. How many metres did the object move?
9. 9.🏋️ A force of 490 N pushes a cart 4 m along the floor. How much work is done, in joules?
10. 10.🏋️ A force of 20 N pushes a cart 6 m along the floor. How much work is done, in joules?
11. 11.🏋️ A force of 460 N pushes a cart 2 m along the floor. How much work is done, in joules?
12. 12.🏋️ Pushing a crate 5 m took 150 J of work. What force was used, in newtons?
13. 13.🏋️ Pushing a crate 4 m took 600 J of work. What force was used, in newtons?
14. 14.🏋️ A 1 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
15. 15.🏋️ In which unit is work measured? (a) watt hour (b) joule (J) (c) metre (m) (d) newton (N)
16. 16.🏋️ A 7 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
17. 17.🏋️ Pushing a crate 2 m took 360 J of work. What force was used, in newtons?
18. 18.🏋️ A 5 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
19. 19.🏋️ A machine lifts a load of 550 N when you push with 110 N. What is its mechanical advantage (MA)?
20. 20.🏋️ A force of 390 N pushes a cart 3 m along the floor. How much work is done, in joules?
21. 21.🏋️ 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?
22. 22.🏋️ A force of 370 N did 1110 J of work. How many metres did the object move?
23. 23.🏋️ A force of 400 N pushes a cart 4 m along the floor. How much work is done, in joules?
24. 24.🏋️ Pushing a crate 1 m took 140 J of work. What force was used, in newtons?
25. 25.🏋️ Pushing a crate 7 m took 630 J of work. What force was used, in newtons?
26. 26.🏋️ A 16 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 160 N when you push with 40 N. What is its mechanical advantage (MA)?
28. 28.🏋️ Pushing a crate 6 m took 2460 J of work. What force was used, in newtons?
29. 29.🏋️ Pushing a crate 6 m took 2700 J of work. What force was used, in newtons?
30. 30.🏋️ A machine lifts a load of 300 N when you push with 50 N. What is its mechanical advantage (MA)?
31. 31.🏋️ A machine lifts a load of 1140 N when you push with 190 N. What is its mechanical advantage (MA)?
32. 32.🏋️ A force of 30 N did 150 J of work. How many metres did the object move?
33. 33.🏋️ A machine lifts a load of 320 N when you push with 160 N. What is its mechanical advantage (MA)?
34. 34.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3200 N box up it, in newtons? (ideal ramp, no friction)
35. 35.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1700 N box up it, in newtons? (ideal ramp, no friction)
36. 36.🏋️ A machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?
37. 37.🏋️ A machine lifts a load of 180 N when you push with 60 N. What is its mechanical advantage (MA)?
38. 38.🏋️ A force of 390 N pushes a cart 8 m along the floor. How much work is done, in joules?
39. 39.🏋️ A force of 420 N pushes a cart 3 m along the floor. How much work is done, in joules?
40. 40.🏋️ Pushing a crate 4 m took 560 J of work. What force was used, in newtons?

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