Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 573 · 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.🏋️ An 11 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
2. 2.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
3. 3.🏋️ A force of 490 N did 2450 J of work. How many metres did the object move?
4. 4.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1100 N box up it, in newtons? (ideal ramp, no friction)
5. 5.🏋️ A force of 460 N pushes a cart 10 m along the floor. How much work is done, in joules?
6. 6.🏋️ A force of 470 N did 2350 J of work. How many metres did the object move?
7. 7.🏋️ A force of 260 N pushes a cart 1 m along the floor. How much work is done, in joules?
8. 8.🏋️ A force of 50 N pushes a cart 8 m along the floor. How much work is done, in joules?
9. 9.🏋️ A force of 230 N pushes a cart 3 m along the floor. How much work is done, in joules?
10. 10.🏋️ A force of 240 N pushes a cart 9 m along the floor. How much work is done, in joules?
11. 11.🏋️ 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)
12. 12.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
13. 13.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) load ÷ effort (d) effort ÷ load
14. 14.🏋️ Pushing a crate 6 m took 840 J of work. What force was used, in newtons?
15. 15.🏋️ A machine lifts a load of 90 N when you push with 30 N. What is its mechanical advantage (MA)?
16. 16.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) joule (J) (d) metre (m)
17. 17.🏋️ A force of 130 N did 1040 J of work. How many metres did the object move?
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 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?
20. 20.🏋️ A longer ramp to the same height needs … (a) more effort (b) less effort (c) the same effort (d) no effort
21. 21.🏋️ A force of 220 N did 1760 J of work. How many metres did the object move?
22. 22.🏋️ A machine lifts a load of 350 N when you push with 70 N. What is its mechanical advantage (MA)?
23. 23.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) only upwards (d) very slowly
24. 24.🏋️ A 5 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
25. 25.🏋️ A 1 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
26. 26.🏋️ Pushing a crate 9 m took 1350 J of work. What force was used, in newtons?
27. 27.🏋️ A force of 190 N pushes a cart 3 m along the floor. How much work is done, in joules?
28. 28.🏋️ A force of 250 N pushes a cart 4 m along the floor. How much work is done, in joules?
29. 29.🏋️ Pushing a crate 4 m took 520 J of work. What force was used, in newtons?
30. 30.🏋️ 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?
31. 31.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 3250 N box up it, in newtons? (ideal ramp, no friction)
32. 32.🏋️ A force of 290 N pushes a cart 1 m along the floor. How much work is done, in joules?
33. 33.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
34. 34.🏋️ A force of 200 N did 1000 J of work. How many metres did the object move?
35. 35.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) no, work stays the same (d) only on Mondays
36. 36.🏋️ A force of 240 N pushes a cart 6 m along the floor. How much work is done, in joules?
37. 37.🏋️ Pushing a crate 3 m took 1170 J of work. What force was used, in newtons?
38. 38.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
39. 39.🏋️ Pushing a crate 8 m took 2480 J of work. What force was used, in newtons?
40. 40.🏋️ Pushing a crate 3 m took 300 J of work. What force was used, in newtons?

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