Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 254 · 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.🏋️ Pushing a crate 5 m took 2000 J of work. What force was used, in newtons?
2. 2.🏋️ A force of 490 N did 1960 J of work. How many metres did the object move?
3. 3.🏋️ A force of 490 N pushes a cart 9 m along the floor. How much work is done, in joules?
4. 4.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
5. 5.🏋️ A machine lifts a load of 850 N when you push with 170 N. What is its mechanical advantage (MA)?
6. 6.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) through a distance (d) without moving it
7. 7.🏋️ An 18 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
8. 8.🏋️ A machine lifts a load of 80 N when you push with 40 N. What is its mechanical advantage (MA)?
9. 9.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
10. 10.🏋️ A force of 130 N pushes a cart 5 m along the floor. How much work is done, in joules?
11. 11.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
12. 12.🏋️ A machine lifts a load of 380 N when you push with 190 N. What is its mechanical advantage (MA)?
13. 13.🏋️ A 12 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
14. 14.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) joule (J) (d) metre (m)
15. 15.🏋️ A force of 290 N did 1450 J of work. How many metres did the object move?
16. 16.🏋️ A force of 390 N did 1560 J of work. How many metres did the object move?
17. 17.🏋️ A longer ramp to the same height needs … (a) the same effort (b) no effort (c) more effort (d) less effort
18. 18.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load + effort (c) load × effort (d) effort ÷ load
19. 19.🏋️ 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?
20. 20.🏋️ A machine lifts a load of 200 N when you push with 50 N. What is its mechanical advantage (MA)?
21. 21.🏋️ A force of 260 N pushes a cart 2 m along the floor. How much work is done, in joules?
22. 22.🏋️ Pushing a crate 7 m took 3290 J of work. What force was used, in newtons?
23. 23.🏋️ A machine lifts a load of 80 N when you push with 20 N. What is its mechanical advantage (MA)?
24. 24.🏋️ A force of 190 N pushes a cart 3 m along the floor. How much work is done, in joules?
25. 25.🏋️ A force of 480 N pushes a cart 7 m along the floor. How much work is done, in joules?
26. 26.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, always (c) only on Mondays (d) yes, by half
27. 27.🏋️ Pushing a crate 1 m took 160 J of work. What force was used, in newtons?
28. 28.🏋️ A machine lifts a load of 50 N when you push with 10 N. What is its mechanical advantage (MA)?
29. 29.🏋️ A machine lifts a load of 260 N when you push with 130 N. What is its mechanical advantage (MA)?
30. 30.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 1250 N box up it, in newtons? (ideal ramp, no friction)
31. 31.🏋️ Pushing a crate 4 m took 1840 J of work. What force was used, in newtons?
32. 32.🏋️ A machine lifts a load of 240 N when you push with 120 N. What is its mechanical advantage (MA)?
33. 33.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
34. 34.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
35. 35.🏋️ A machine lifts a load of 360 N when you push with 60 N. What is its mechanical advantage (MA)?
36. 36.🏋️ A force of 60 N pushes a cart 1 m along the floor. How much work is done, in joules?
37. 37.🏋️ An 8 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
38. 38.🏋️ A force of 170 N pushes a cart 8 m along the floor. How much work is done, in joules?
39. 39.🏋️ A 16 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
40. 40.🏋️ Pushing a crate 1 m took 390 J of work. What force was used, in newtons?

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