Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 555 · 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.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 3 N, a wooden plank 7 N, a carpet 10 N, sandpaper 12 N. Which surface gave the most friction? (a) sandpaper (b) a wooden plank (c) a glass sheet (d) a carpet
2. 2.⚖️ What is the pivot point of a lever called? (a) the load (b) the effort (c) the fulcrum (d) the axle
3. 3.🔍 Which is the odd one out? (a) a well-bucket rope wheel (b) a door stopper (c) the tip of a nail (d) an axe blade
4. 4.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
5. 5.⚖️ A seesaw balances. Zoya (? N) sits 2 m from the pivot on one side; Meena (260 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
6. 6.⚖️ Which class of lever is a lemon squeezer? (a) class 1 (b) class 2 (c) class 3
7. 7.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, sandpaper 10 N, ice 1 N, a glass sheet 5 N. How many newtons more were needed on sandpaper than on ice?
8. 8.⚖️ A seesaw balances. Asha (? N) sits 3 m from the pivot on one side; Ravi (330 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
9. 9.True or false: the tip of a nail is a wedge. (a) False (b) True
10. 10.💪 A bag has a mass of 5 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
11. 11.🛞 More or less friction: a smooth steel slide? (a) less friction (b) more friction
12. 12.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 30 cm and the load at 20 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
13. 13.⚖️ A lever bar balances. The load is 120 N at 40 cm from the fulcrum. The effort is 120 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
14. 14.⚖️ Going along a lever from one end to the other, the order is: effort, load, fulcrum. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
15. 15.True or false: pushing a swing is a pull. (a) True (b) False
16. 16.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 40 cm and the load at 60 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
17. 17.True or false: a seesaw is an inclined plane. (a) False (b) True
18. 18.⚙️ How many simple machines are there in the usual list? (a) 10 (b) 3 (c) 6 (d) 12
19. 19.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load ÷ effort (d) load + effort
20. 20.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 5 N, a wooden plank 9 N, sandpaper 10 N. Which surface gave the most friction? (a) a glass sheet (b) ice (c) sandpaper (d) a wooden plank
21. 21.⚖️ A lever bar balances. The load is 800 N at 20 cm from the fulcrum. The effort is 160 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
22. 22.⚖️ A lever bar balances. The load is 500 N at 40 cm from the fulcrum. The effort is ? N at 100 cm from the fulcrum on the other side. What is the missing force in newtons?
23. 23.True or false: a broom when sweeping is a class 2 lever (load in the middle). (a) False (b) True
24. 24.True or false: a playground slide is a wedge. (a) True (b) False
25. 25.🛞 More or less friction: a tyre with deep treads? (a) less friction (b) more friction
26. 26.🏋️ A force of 490 N pushes a cart 7 m along the floor. How much work is done, in joules?
27. 27.True or false: a pair of tweezers is a class 1 lever (fulcrum in the middle). (a) False (b) True
28. 28.🏋️ A longer ramp to the same height needs … (a) the same effort (b) less effort (c) more effort (d) no effort
29. 29.⚖️ Which class of lever is a beam balance? (a) class 1 (b) class 2 (c) class 3
30. 30.⚖️ Which class of lever is a broom when sweeping? (a) class 3 (b) class 1 (c) class 2
31. 31.🪝 A winch has a wheel of radius 16 cm and an axle of radius 2 cm. What effort on the wheel lifts a 1200 N bucket on the axle, in newtons? (ideal)
32. 32.💪 A bag has a mass of 2 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
33. 33.🔍 Which is the odd one out? (a) a tyre with deep treads (b) sand on a slippery path (c) a grippy rubber sole (d) skating on ice
34. 34.True or false: a wheelbarrow is a class 1 lever (fulcrum in the middle). (a) True (b) False
35. 35.⚙️ A screw is really … (a) a tiny pulley (b) a kind of wheel (c) a bent lever (d) a ramp wrapped round
36. 36.🔍 Which is the odd one out? (a) a nut and bolt (b) a jar lid (c) a wood screw (d) a seesaw
37. 37.True or false: a movable pulley rises with the load. (a) True (b) False
38. 38.True or false: a movable pulley makes you pull 2× rope. (a) False (b) True
39. 39.🏋️ A 19 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
40. 40.🛞 Which surface gives the MOST friction to a sliding block? (a) polished marble (b) glass (c) sandpaper (d) ice

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