Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 283 · 40 questions

Engineer's tip (Find the topic, use the idea): Find the topic: force, friction, machine, lever class, balance, pulley or work. Use that lesson’s rule — what is in the middle, load × distance = effort × distance, effort = load ÷ ropes, work = force × distance. Write the calculation before you answer.

1. 1.🪝 Fixed or movable pulley: which one only changes direction? (a) a fixed pulley (b) a movable pulley
2. 2.True or false: opening a drawer is a pull. (a) True (b) False
3. 3.🏋️ A force of 90 N did 180 J of work. How many metres did the object move?
4. 4.🪝 A pulley system lifts a 90 N load with an effort of 30 N. What is its mechanical advantage (MA)?
5. 5.🏋️ A machine lifts a load of 40 N when you push with 20 N. What is its mechanical advantage (MA)?
6. 6.💪 Is pushing a trolley a push or a pull? (a) a pull (b) a push
7. 7.⚖️ A seesaw balances. Zoya (140 N) sits 4 m from the pivot on one side; Arjun (560 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
8. 8.⚖️ A lever bar balances. The load is 810 N at 50 cm from the fulcrum. The effort is 450 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
9. 9.🏋️ A force of 310 N pushes a cart 9 m along the floor. How much work is done, in joules?
10. 10.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) no, work stays the same (c) yes, always (d) only on Mondays
11. 11.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, a carpet 9 N, sandpaper 13 N, ice 3 N. Which surface gave the most friction? (a) ice (b) a carpet (c) a wooden plank (d) sandpaper
12. 12.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) through a distance (d) only upwards
13. 13.🪝 Fixed or movable pulley: which one rises with the load? (a) a fixed pulley (b) a movable pulley
14. 14.🔍 Which is the odd one out? (a) powder on a carrom board (b) a rough doormat (c) chalk on a gym bar (d) a tyre with deep treads
15. 15.⚙️ Which simple machine is a nutcracker? (a) wheel and axle (b) pulley (c) lever (d) screw
16. 16.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, a carpet 9 N, ice 2 N, a glass sheet 3 N. How many newtons more were needed on a carpet than on ice?
17. 17.⚙️ Which simple machine is a well winch handle? (a) pulley (b) lever (c) wheel and axle (d) inclined plane
18. 18.🪝 What does a single fixed pulley change? (a) gravity (b) the size of the load (c) the colour of rope (d) the direction of pull
19. 19.💪 Is opening a drawer a push or a pull? (a) a push (b) a pull
20. 20.⚖️ A lever bar balances. The load is 100 N at ? cm from the fulcrum. The effort is 80 N at 50 cm from the fulcrum on the other side. What is the missing distance in centimetres?
21. 21.True or false: a box pushed on carpet gives less friction. (a) True (b) False
22. 22.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 3250 N box up it, in newtons? (ideal ramp, no friction)
23. 23.⚖️ Going along a lever from one end to the other, the order is: load, fulcrum, effort. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
24. 24.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a wooden plank 6 N, a carpet 7 N, sandpaper 8 N. How many newtons more were needed on sandpaper than on ice?
25. 25.🛞 Why are tyres made with deep treads? (a) to save rubber (b) to grip the road (c) to look nice (d) to go slower
26. 26.🪝 A pulley system lifts a 420 N load with an effort of 210 N. What is its mechanical advantage (MA)?
27. 27.🏋️ A force of 340 N did 3400 J of work. How many metres did the object move?
28. 28.⚖️ On a seesaw, a heavier child should sit … (a) anywhere (b) farther from the pivot (c) closer to the pivot (d) on the pivot
29. 29.🛞 More or less friction: a grippy rubber sole? (a) more friction (b) less friction
30. 30.🛞 Is friction helpful or a problem here: machine parts heating up? (a) helpful (b) a problem
31. 31.⚖️ In a class 1 lever, what is in the middle? (a) the effort (b) the load (c) the fulcrum (d) nothing
32. 32.⚖️ A lever bar balances. The load is 270 N at 30 cm from the fulcrum. The effort is 90 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
33. 33.💪 Which force pulls everything towards the Earth? (a) magnetism (b) wind (c) friction (d) gravity
34. 34.⚖️ A lever balances when … (a) the fulcrum moves (b) the bar is short (c) both weights are equal (d) turning effects match
35. 35.True or false: a tug of war is a push. (a) False (b) True
36. 36.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 2 N, a wooden plank 4 N, a carpet 5 N, sandpaper 8 N. How many newtons more were needed on sandpaper than on a glass sheet?
37. 37.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 20 cm and the load at 50 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
38. 38.True or false: a chisel is a lever. (a) True (b) False
39. 39.⚖️ A lever bar balances. The load is 100 N at 10 cm from the fulcrum. The effort is ? N at 20 cm from the fulcrum on the other side. What is the missing force in newtons?
40. 40.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 5700 N box up it, in newtons? (ideal ramp, no friction)

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