Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 644 · 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) less effort (b) no effort (c) more effort (d) the same effort
2. 2.🛞 How can we reduce friction in a machine? (a) oil the moving parts (b) make parts rough (c) press parts harder (d) add sand
3. 3.Which of these is a lever? (a) an axe blade (b) a window blind cord (c) a jar lid (d) a seesaw
4. 4.⚖️ A lever bar balances. The load is 360 N at ? cm from the fulcrum. The effort is 270 N at 40 cm from the fulcrum on the other side. What is the missing distance in centimetres?
5. 5.True or false: powder on a carrom board gives more friction. (a) False (b) True
6. 6.🪝 A well winch has a handle (wheel) of radius 2 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
7. 7.True or false: a movable pulley hangs on the rope loop. (a) False (b) True
8. 8.🏋️ A 9 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
9. 9.True or false: a seesaw is a class 2 lever (load in the middle). (a) False (b) True
10. 10.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 6 m, how many metres of rope must you pull?
11. 11.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 2 m, how many metres of rope must you pull?
12. 12.💪 A force is a … (a) push or a pull (b) unit of time (c) kind of colour (d) type of sound
13. 13.Which of these is a wedge? (a) a playground slide (b) a knife edge (c) a claw hammer on a nail (d) a seesaw
14. 14.Which of these is caused by friction? (a) pedalling a cycle (b) a river flows downhill (c) rubbing hands warms them (d) squeezing a lemon
15. 15.🔍 Which is the odd one out? (a) the tip of a nail (b) a chisel (c) a flagpole rope wheel (d) an axe blade
16. 16.🏋️ A 4 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
17. 17.🏋️ Pushing a crate 4 m took 1520 J of work. What force was used, in newtons?
18. 18.True or false: a crowbar is a class 2 lever (load in the middle). (a) True (b) False
19. 19.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) a problem (b) helpful
20. 20.True or false: a fixed pulley only changes direction. (a) True (b) False
21. 21.Which of these is caused by friction? (a) an apple falls down (b) brakes stop a bicycle (c) a fridge magnet sticks (d) a compass needle turns
22. 22.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a wooden plank 4 N, a carpet 6 N, sandpaper 9 N. Which surface gave the most friction? (a) a wooden plank (b) ice (c) a carpet (d) sandpaper
23. 23.🔍 Which is the odd one out? (a) a box pushed on carpet (b) a wet tiled floor (c) a rough doormat (d) a grippy rubber sole
24. 24.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 4 m, how many metres of rope must you pull?
25. 25.⚖️ A lever bar balances. The load is 450 N at 20 cm from the fulcrum. The effort is 180 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
26. 26.🏋️ A force of 380 N did 760 J of work. How many metres did the object move?
27. 27.🛞 More or less friction: a grippy rubber sole? (a) less friction (b) more friction
28. 28.True or false: a bottle opener is a lever. (a) True (b) False
29. 29.True or false: a movable pulley only changes direction. (a) True (b) False
30. 30.💪 A bag has a mass of 27 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
31. 31.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) only upwards (d) through a distance
32. 32.True or false: a broom when sweeping is a class 3 lever (effort in the middle). (a) True (b) False
33. 33.True or false: a well-bucket rope wheel is a pulley. (a) False (b) True
34. 34.⚖️ Which class of lever is a fishing rod? (a) class 1 (b) class 3 (c) class 2
35. 35.Which of these is a pulley? (a) a knife edge (b) a crowbar (c) a playground slide (d) a flagpole rope wheel
36. 36.True or false: pushing a trolley is a pull. (a) False (b) True
37. 37.True or false: skating on ice gives more friction. (a) False (b) True
38. 38.⚖️ A seesaw balances. Ravi (220 N) sits 1 m from the pivot on one side; Kabir (110 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
39. 39.🛞 More or less friction: a wet tiled floor? (a) less friction (b) more friction
40. 40.🏋️ A machine lifts a load of 300 N when you push with 100 N. What is its mechanical advantage (MA)?

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