Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 134 · 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.⚖️ A lever balances when … (a) turning effects match (b) the bar is short (c) the fulcrum moves (d) both weights are equal
2. 2.🏋️ A 1 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
3. 3.🪝 Fixed or movable pulley: which one rises with the load? (a) a movable pulley (b) a fixed pulley
4. 4.🏋️ 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?
5. 5.🪝 A well winch has a handle (wheel) of radius 8 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
6. 6.True or false: a box pushed on carpet gives more friction. (a) False (b) True
7. 7.⚖️ In a class 1 lever, what is in the middle? (a) the fulcrum (b) the effort (c) nothing (d) the load
8. 8.⚖️ A seesaw balances. Asha (600 N) sits 2 m from the pivot on one side; Ravi (400 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
9. 9.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 3 N, a carpet 4 N, sandpaper 5 N. Which surface gave the most friction? (a) sandpaper (b) a glass sheet (c) a carpet (d) ice
10. 10.🏋️ A force of 290 N did 1160 J of work. How many metres did the object move?
11. 11.True or false: a tug of war is a push. (a) False (b) True
12. 12.⚙️ Which simple machine is a wood screw? (a) screw (b) wedge (c) lever (d) wheel and axle
13. 13.⚖️ A seesaw balances. Zoya (330 N) sits ? m from the pivot on one side; Kabir (110 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
14. 14.🏋️ Pushing a crate 8 m took 1200 J of work. What force was used, in newtons?
15. 15.💪 Which force is at work: squeezing a lemon? (a) friction (b) gravity (c) muscular force (d) magnetic force
16. 16.⚖️ Along a straight bar, measured from the left end, the effort is at 70 cm, the fulcrum at 60 cm and the load at 20 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
17. 17.🪝 A winch has a wheel of radius 5 cm and an axle of radius 1 cm. What effort on the wheel lifts a 700 N bucket on the axle, in newtons? (ideal)
18. 18.True or false: a chisel is a wedge. (a) False (b) True
19. 19.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1950 N box up it, in newtons? (ideal ramp, no friction)
20. 20.True or false: a bottle opener is a screw. (a) False (b) True
21. 21.🔍 Which is the odd one out? (a) a rough doormat (b) a grippy rubber sole (c) sand on a slippery path (d) a wet tiled floor
22. 22.Which of these is an inclined plane? (a) a water tap handle (b) a seesaw (c) a wood screw (d) a wheelchair ramp
23. 23.⚙️ Which simple machine is a wheelchair ramp? (a) inclined plane (b) screw (c) wheel and axle (d) lever
24. 24.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) load ÷ effort (d) effort ÷ load
25. 25.⚖️ Going along a lever from one end to the other, the order is: load, fulcrum, effort. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
26. 26.🏋️ 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?
27. 27.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) metre (m) (d) watt hour
28. 28.⚖️ A lever bar balances. The load is 400 N at 20 cm from the fulcrum. The effort is 80 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
29. 29.Which of these is a wedge? (a) a water tap handle (b) a jar lid (c) a seesaw (d) a chisel
30. 30.True or false: pulling a cart is a pull. (a) False (b) True
31. 31.⚖️ A seesaw balances. Ravi (120 N) sits ? m from the pivot on one side; Kabir (240 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
32. 32.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 7 N, ice 1 N, a wooden plank 2 N, a carpet 3 N. Which surface gave the least friction? (a) a carpet (b) a wooden plank (c) sandpaper (d) ice
33. 33.🏋️ A machine lifts a load of 210 N when you push with 70 N. What is its mechanical advantage (MA)?
34. 34.🛞 Why are tyres made with deep treads? (a) to go slower (b) to look nice (c) to grip the road (d) to save rubber
35. 35.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 60 N at 70 cm from the fulcrum on the other side. What is the missing force in newtons?
36. 36.True or false: a fixed pulley halves the effort. (a) False (b) True
37. 37.True or false: a tyre with deep treads gives less friction. (a) False (b) True
38. 38.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 7 N, ice 3 N, a wooden plank 4 N, a carpet 5 N. Which surface gave the most friction? (a) sandpaper (b) a wooden plank (c) a carpet (d) ice
39. 39.💪 Which force pulls everything towards the Earth? (a) gravity (b) magnetism (c) wind (d) friction
40. 40.True or false: a lemon squeezer is a class 2 lever (load in the middle). (a) True (b) False

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