Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 343 · 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) joule (J) (c) newton (N) (d) metre (m)
2. 2.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) load ÷ effort (d) effort ÷ load
3. 3.🏋️ A 7 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
4. 4.🏋️ A force of 190 N pushes a cart 8 m along the floor. How much work is done, in joules?
5. 5.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
6. 6.🏋️ A force of 450 N pushes a cart 6 m along the floor. How much work is done, in joules?
7. 7.🏋️ A force of 110 N did 330 J of work. How many metres did the object move?
8. 8.🏋️ A force of 130 N did 780 J of work. How many metres did the object move?
9. 9.🏋️ An 8 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
10. 10.🏋️ A machine lifts a load of 300 N when you push with 100 N. What is its mechanical advantage (MA)?
11. 11.🏋️ An 11 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
12. 12.🏋️ A 10 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
13. 13.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
14. 14.🏋️ A 13 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
15. 15.🏋️ A force of 410 N pushes a cart 10 m along the floor. How much work is done, in joules?
16. 16.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) only on Mondays (d) no, work stays the same
17. 17.🏋️ A machine lifts a load of 520 N when you push with 130 N. What is its mechanical advantage (MA)?
18. 18.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) only upwards (d) without moving it
19. 19.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
20. 20.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
21. 21.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 2750 N box up it, in newtons? (ideal ramp, no friction)
22. 22.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
23. 23.🏋️ A force of 120 N pushes a cart 8 m along the floor. How much work is done, in joules?
24. 24.🏋️ A machine lifts a load of 280 N when you push with 140 N. What is its mechanical advantage (MA)?
25. 25.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 3300 N box up it, in newtons? (ideal ramp, no friction)
26. 26.🏋️ Pushing a crate 5 m took 2100 J of work. What force was used, in newtons?
27. 27.🏋️ A force of 50 N pushes a cart 3 m along the floor. How much work is done, in joules?
28. 28.🏋️ A force of 90 N did 270 J of work. How many metres did the object move?
29. 29.🏋️ A force of 440 N did 1760 J of work. How many metres did the object move?
30. 30.🏋️ 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?
31. 31.🏋️ Pushing a crate 5 m took 1600 J of work. What force was used, in newtons?
32. 32.🏋️ Pushing a crate 2 m took 740 J of work. What force was used, in newtons?
33. 33.🏋️ A 4 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
34. 34.🏋️ 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)
35. 35.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 4250 N box up it, in newtons? (ideal ramp, no friction)
36. 36.🏋️ A machine lifts a load of 80 N when you push with 40 N. What is its mechanical advantage (MA)?
37. 37.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
38. 38.🏋️ A 3 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
39. 39.🏋️ A force of 140 N pushes a cart 10 m along the floor. How much work is done, in joules?
40. 40.🏋️ Pushing a crate 8 m took 2480 J of work. What force was used, in newtons?

Free engineering lessons, practice and worksheets at talentjr.in/engineering-for-kids