Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 921 · 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.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 100 cm and the load at 60 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
2. 2.🪝 A well winch has a handle (wheel) of radius 7 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
3. 3.True or false: pulling a cart is a pull. (a) False (b) True
4. 4.⚖️ 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
5. 5.🛞 Why are tyres made with deep treads? (a) to look nice (b) to save rubber (c) to grip the road (d) to go slower
6. 6.💪 Is pressing a doorbell a push or a pull? (a) a push (b) a pull
7. 7.True or false: a movable pulley hangs on the rope loop. (a) True (b) False
8. 8.True or false: kicking a football is a pull. (a) True (b) False
9. 9.⚖️ Which class of lever is a pair of scissors? (a) class 3 (b) class 1 (c) class 2
10. 10.⚖️ What is the pivot point of a lever called? (a) the load (b) the effort (c) the fulcrum (d) the axle
11. 11.⚖️ A lever bar balances. The load is ? N at 40 cm from the fulcrum. The effort is 320 N at 90 cm from the fulcrum on the other side. What is the missing force in newtons?
12. 12.⚖️ A lever balances when … (a) turning effects match (b) both weights are equal (c) the fulcrum moves (d) the bar is short
13. 13.Which of these is caused by muscular force? (a) a compass needle turns (b) a rolling ball slows (c) a magnet picks up pins (d) pedalling a cycle
14. 14.⚖️ In a class 1 lever, what is in the middle? (a) the effort (b) the load (c) nothing (d) the fulcrum
15. 15.🏋️ A machine lifts a load of 180 N when you push with 30 N. What is its mechanical advantage (MA)?
16. 16.💪 Which force is at work: an apple falls down? (a) magnetic force (b) friction (c) muscular force (d) gravity
17. 17.💪 Which force is at work: a thrown ball comes down? (a) friction (b) gravity (c) magnetic force (d) muscular force
18. 18.🛞 Which surface gives the MOST friction to a sliding block? (a) glass (b) polished marble (c) ice (d) sandpaper
19. 19.True or false: pulling up your socks is a push. (a) True (b) False
20. 20.🏋️ A 1 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
21. 21.💪 Which force is at work: rain falls to the ground? (a) friction (b) magnetic force (c) muscular force (d) gravity
22. 22.🔍 Which is the odd one out? (a) a grippy rubber sole (b) a smooth steel slide (c) skating on ice (d) a wet tiled floor
23. 23.🏋️ A force of 370 N pushes a cart 2 m along the floor. How much work is done, in joules?
24. 24.⚖️ In a class 3 lever, what is in the middle? (a) the load (b) the effort (c) the pulley (d) the fulcrum
25. 25.⚖️ A seesaw balances. Arjun (160 N) sits 3 m from the pivot on one side; Asha (? N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
26. 26.🪝 More rope sections holding a load means … (a) no change (b) the load floats (c) more effort needed (d) less effort needed
27. 27.⚖️ A seesaw balances. Asha (? N) sits 2 m from the pivot on one side; Ravi (200 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
28. 28.🏋️ A 6 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
29. 29.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 80 cm and the load at 50 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
30. 30.True or false: pushing a trolley is a pull. (a) True (b) False
31. 31.💪 A force is a … (a) unit of time (b) push or a pull (c) kind of colour (d) type of sound
32. 32.🛞 More or less friction: a box pushed on carpet? (a) less friction (b) more friction
33. 33.⚙️ A wedge is … (a) a bar on a pivot (b) a wheel on a rod (c) a rope on a wheel (d) two ramps back to back
34. 34.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 700 N box up it, in newtons? (ideal ramp, no friction)
35. 35.⚙️ A screw is really … (a) a kind of wheel (b) a bent lever (c) a tiny pulley (d) a ramp wrapped round
36. 36.Which of these is a screw? (a) a well-bucket rope wheel (b) a screw jack (c) a chisel (d) a seesaw
37. 37.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) through a distance (d) only upwards
38. 38.💪 A bag has a mass of 22 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
39. 39.True or false: a movable pulley rises with the load. (a) False (b) True
40. 40.True or false: opening a drawer is a push. (a) False (b) True

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