Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 59 · 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) watt hour (b) newton (N) (c) joule (J) (d) metre (m)
2. 2.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) only on Mondays (d) no, work stays the same
3. 3.🏋️ A machine lifts a load of 760 N when you push with 190 N. What is its mechanical advantage (MA)?
4. 4.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) load ÷ effort (d) effort ÷ load
5. 5.🏋️ 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?
6. 6.🏋️ A force of 50 N did 50 J of work. How many metres did the object move?
7. 7.🏋️ A machine lifts a load of 360 N when you push with 180 N. What is its mechanical advantage (MA)?
8. 8.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
9. 9.🏋️ Pushing a crate 9 m took 1620 J of work. What force was used, in newtons?
10. 10.🏋️ 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?
11. 11.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) only upwards (d) very slowly
12. 12.🏋️ Pushing a crate 2 m took 520 J of work. What force was used, in newtons?
13. 13.🏋️ A machine lifts a load of 250 N when you push with 50 N. What is its mechanical advantage (MA)?
14. 14.🏋️ A force of 100 N did 600 J of work. How many metres did the object move?
15. 15.🏋️ A 6 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
16. 16.🏋️ A longer ramp to the same height needs … (a) the same effort (b) less effort (c) more effort (d) no effort
17. 17.🏋️ A force of 50 N pushes a cart 7 m along the floor. How much work is done, in joules?
18. 18.🏋️ Pushing a crate 10 m took 800 J of work. What force was used, in newtons?
19. 19.🏋️ A force of 310 N pushes a cart 3 m along the floor. How much work is done, in joules?
20. 20.🏋️ A force of 170 N did 1360 J of work. How many metres did the object move?
21. 21.🏋️ A force of 230 N did 1380 J of work. How many metres did the object move?
22. 22.🏋️ A machine lifts a load of 90 N when you push with 30 N. What is its mechanical advantage (MA)?
23. 23.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
24. 24.🏋️ A machine lifts a load of 40 N when you push with 20 N. What is its mechanical advantage (MA)?
25. 25.🏋️ A force of 40 N pushes a cart 9 m along the floor. How much work is done, in joules?
26. 26.🏋️ 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?
27. 27.🏋️ A machine lifts a load of 40 N when you push with 10 N. What is its mechanical advantage (MA)?
28. 28.🏋️ A 14 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
29. 29.🏋️ A force of 90 N did 810 J of work. How many metres did the object move?
30. 30.🏋️ A force of 100 N did 900 J of work. How many metres did the object move?
31. 31.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
32. 32.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
33. 33.🏋️ A 15 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
34. 34.🏋️ A force of 320 N pushes a cart 8 m along the floor. How much work is done, in joules?
35. 35.🏋️ Pushing a crate 2 m took 820 J of work. What force was used, in newtons?
36. 36.🏋️ A force of 70 N pushes a cart 9 m along the floor. How much work is done, in joules?
37. 37.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
38. 38.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
39. 39.🏋️ 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)
40. 40.🏋️ A machine lifts a load of 140 N when you push with 70 N. What is its mechanical advantage (MA)?

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