Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 528 · 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 longer ramp to the same height needs … (a) the same effort (b) no effort (c) more effort (d) less effort
2. 2.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 10 N at 50 cm from the fulcrum on the other side. What is the missing force in newtons?
3. 3.🛞 Why are tyres made with deep treads? (a) to save rubber (b) to look nice (c) to go slower (d) to grip the road
4. 4.🔍 Which is the odd one out? (a) a rough doormat (b) a grippy rubber sole (c) a smooth steel slide (d) sand on a slippery path
5. 5.💪 Which force is at work: squeezing a lemon? (a) friction (b) muscular force (c) gravity (d) magnetic force
6. 6.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 2 N, a wooden plank 3 N, a carpet 5 N, sandpaper 7 N. How many newtons more were needed on sandpaper than on a glass sheet?
7. 7.🪝 Fixed or movable pulley: which one stays in one place? (a) a movable pulley (b) a fixed pulley
8. 8.True or false: hitting a cricket ball is a pull. (a) False (b) True
9. 9.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) near the fulcrum (b) on the fulcrum (c) on the rock (d) far from the fulcrum
10. 10.True or false: a wet tiled floor gives less friction. (a) True (b) False
11. 11.True or false: opening a drawer is a pull. (a) False (b) True
12. 12.True or false: a pair of tweezers is a class 3 lever (effort in the middle). (a) False (b) True
13. 13.💪 A cart is pulled to the right with 80 N and to the left with 90 N. Which way does the net force act? (a) no net force (b) to the right (c) to the left
14. 14.True or false: a movable pulley only changes direction. (a) False (b) True
15. 15.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) a problem (b) helpful
16. 16.Which of these is caused by gravity? (a) a fridge magnet sticks (b) rubbing hands warms them (c) lifting a school bag (d) an apple falls down
17. 17.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 9 N, sandpaper 10 N, ice 3 N, a glass sheet 7 N. How many newtons more were needed on sandpaper than on ice?
18. 18.⚖️ A lever bar balances. The load is ? N at 40 cm from the fulcrum. The effort is 120 N at 80 cm from the fulcrum on the other side. What is the missing force in newtons?
19. 19.Which of these is a pulley? (a) a wheelchair ramp (b) a road up a hill (c) a window blind cord (d) a jar lid
20. 20.💪 A cart is pulled to the right with 75 N and to the left with 65 N. Which way does the net force act? (a) no net force (b) to the left (c) to the right
21. 21.🪝 Fixed or movable pulley: which one halves the effort? (a) a fixed pulley (b) a movable pulley
22. 22.🛞 More or less friction: a grippy rubber sole? (a) more friction (b) less friction
23. 23.⚖️ Turning effect = force × … (a) mass of fulcrum (b) time taken (c) distance from fulcrum (d) colour of bar
24. 24.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a glass sheet 7 N, a carpet 9 N, sandpaper 11 N. Which surface gave the least friction? (a) sandpaper (b) a carpet (c) a glass sheet (d) ice
25. 25.True or false: sand on a slippery path gives more friction. (a) True (b) False
26. 26.True or false: pushing a trolley is a pull. (a) True (b) False
27. 27.💪 Which force is at work: brakes stop a bicycle? (a) friction (b) muscular force (c) gravity (d) magnetic force
28. 28.True or false: a lemon squeezer is a class 2 lever (load in the middle). (a) True (b) False
29. 29.True or false: drawing up a well bucket is a push. (a) True (b) False
30. 30.💪 A bag has a mass of 60 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
31. 31.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) a problem (b) helpful
32. 32.⚖️ A seesaw balances. Zoya (640 N) sits 4 m from the pivot on one side; Arjun (640 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
33. 33.💪 Which force is at work: lifting a school bag? (a) friction (b) magnetic force (c) muscular force (d) gravity
34. 34.True or false: a pair of pliers is a class 2 lever (load in the middle). (a) False (b) True
35. 35.🛞 How can we reduce friction in a machine? (a) make parts rough (b) press parts harder (c) add sand (d) oil the moving parts
36. 36.⚙️ Which simple machine is a nutcracker? (a) wheel and axle (b) wedge (c) lever (d) inclined plane
37. 37.🏋️ A force of 90 N did 270 J of work. How many metres did the object move?
38. 38.⚖️ A seesaw balances. Kabir (240 N) sits ? m from the pivot on one side; Meena (480 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?
39. 39.🪝 A winch has a wheel of radius 6 cm and an axle of radius 3 cm. What effort on the wheel lifts a 180 N bucket on the axle, in newtons? (ideal)
40. 40.🛞 Rubbing your hands fast makes them … (a) wet (b) warm (c) cold (d) magnetic

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