Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 146 · 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 force of 300 N pushes a cart 3 m along the floor. How much work is done, in joules?
2. 2.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) joule (J) (d) metre (m)
3. 3.🏋️ A machine lifts a load of 600 N when you push with 150 N. What is its mechanical advantage (MA)?
4. 4.🏋️ A force of 250 N pushes a cart 1 m along the floor. How much work is done, in joules?
5. 5.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
6. 6.🏋️ A 20 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
7. 7.🏋️ Pushing a crate 2 m took 200 J of work. What force was used, in newtons?
8. 8.🏋️ A force of 180 N did 900 J of work. How many metres did the object move?
9. 9.🏋️ A force of 40 N pushes a cart 3 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 1500 N box up it, in newtons? (ideal ramp, no friction)
11. 11.🏋️ A machine lifts a load of 780 N when you push with 130 N. What is its mechanical advantage (MA)?
12. 12.🏋️ A force of 50 N pushes a cart 7 m along the floor. How much work is done, in joules?
13. 13.🏋️ A 9 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
14. 14.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) no, work stays the same (c) yes, by half (d) only on Mondays
15. 15.🏋️ A machine lifts a load of 80 N when you push with 20 N. What is its mechanical advantage (MA)?
16. 16.🏋️ A force of 190 N did 1710 J of work. How many metres did the object move?
17. 17.🏋️ A force of 360 N did 3240 J of work. How many metres did the object move?
18. 18.🏋️ A 9 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
19. 19.🏋️ A machine lifts a load of 120 N when you push with 60 N. What is its mechanical advantage (MA)?
20. 20.🏋️ Pushing a crate 6 m took 1080 J of work. What force was used, in newtons?
21. 21.🏋️ 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)
22. 22.🏋️ A force of 370 N did 1480 J of work. How many metres did the object move?
23. 23.🏋️ A force of 380 N did 3420 J of work. How many metres did the object move?
24. 24.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) very slowly (d) only upwards
25. 25.🏋️ A longer ramp to the same height needs … (a) less effort (b) no effort (c) the same effort (d) more effort
26. 26.🏋️ A 15 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
27. 27.🏋️ A force of 370 N pushes a cart 6 m along the floor. How much work is done, in joules?
28. 28.🏋️ 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)
29. 29.🏋️ 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?
30. 30.🏋️ A force of 420 N pushes a cart 1 m along the floor. How much work is done, in joules?
31. 31.🏋️ A 6 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
32. 32.🏋️ A force of 140 N pushes a cart 6 m along the floor. How much work is done, in joules?
33. 33.🏋️ 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?
34. 34.🏋️ A force of 460 N did 460 J of work. How many metres did the object move?
35. 35.🏋️ A machine lifts a load of 800 N when you push with 160 N. What is its mechanical advantage (MA)?
36. 36.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 5100 N box up it, in newtons? (ideal ramp, no friction)
37. 37.🏋️ An 18 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
38. 38.🏋️ A force of 400 N pushes a cart 5 m along the floor. How much work is done, in joules?
39. 39.🏋️ A force of 300 N did 1800 J of work. How many metres did the object move?
40. 40.🏋️ A 2 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

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