Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 880 · 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 well winch has a handle (wheel) of radius 12 cm turning an axle of radius 4 cm. What is its mechanical advantage (MA)?
2. 2.🪝 Fixed or movable pulley: which one halves the effort? (a) a fixed pulley (b) a movable pulley
3. 3.⚖️ A seesaw balances. Ravi (190 N) sits 1 m from the pivot on one side; Zoya (190 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
4. 4.⚖️ Going along a lever from one end to the other, the order is: effort, fulcrum, load. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
5. 5.⚖️ Which class of lever is a pair of scissors? (a) class 1 (b) class 3 (c) class 2
6. 6.True or false: a playground slide is an inclined plane. (a) True (b) False
7. 7.💪 Is kicking a football a push or a pull? (a) a pull (b) a push
8. 8.🔍 Which is the odd one out? (a) a window blind cord (b) a door stopper (c) an axe blade (d) a knife edge
9. 9.⚖️ Which class of lever is a pair of tweezers? (a) class 1 (b) class 3 (c) class 2
10. 10.⚖️ In a class 2 lever, what is in the middle? (a) the effort (b) the fulcrum (c) the load (d) the axle
11. 11.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
12. 12.True or false: a crowbar is a class 2 lever (load in the middle). (a) False (b) True
13. 13.True or false: a nutcracker is a class 2 lever (load in the middle). (a) True (b) False
14. 14.🔍 Which is the odd one out? (a) a seesaw (b) a bottle opener (c) a crane hook block (d) a nutcracker
15. 15.⚖️ A lever bar balances. The load is ? N at 40 cm from the fulcrum. The effort is 160 N at 70 cm from the fulcrum on the other side. What is the missing force in newtons?
16. 16.🛞 Friction acts … (a) with the motion (b) against the motion (c) only on ice (d) only upwards
17. 17.⚖️ Which class of lever is a fishing rod? (a) class 1 (b) class 2 (c) class 3
18. 18.⚖️ A lever bar balances. The load is ? N at 20 cm from the fulcrum. The effort is 40 N at 20 cm from the fulcrum on the other side. What is the missing force in newtons?
19. 19.🛞 Is friction helpful or a problem here: walking without slipping? (a) a problem (b) helpful
20. 20.⚖️ A lever bar balances. The load is 600 N at 10 cm from the fulcrum. The effort is ? N at 60 cm from the fulcrum on the other side. What is the missing force in newtons?
21. 21.True or false: powder on a carrom board gives less friction. (a) True (b) False
22. 22.⚙️ Which simple machine is a steering wheel? (a) wheel and axle (b) wedge (c) lever (d) inclined plane
23. 23.⚖️ A seesaw balances. Zoya (600 N) sits 1 m from the pivot on one side; Meena (200 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
24. 24.💪 Which force pulls everything towards the Earth? (a) gravity (b) magnetism (c) friction (d) wind
25. 25.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 8 N, a wooden plank 11 N, a carpet 15 N, ice 4 N. Which surface gave the least friction? (a) a glass sheet (b) a carpet (c) ice (d) a wooden plank
26. 26.🔍 Which is the odd one out? (a) a grippy rubber sole (b) a rough doormat (c) a smooth steel slide (d) a box pushed on carpet
27. 27.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 4 m, how many metres of rope must you pull?
28. 28.⚙️ Which simple machine is a knife edge? (a) wedge (b) inclined plane (c) lever (d) wheel and axle
29. 29.💪 Which force is at work: a river flows downhill? (a) gravity (b) muscular force (c) magnetic force (d) friction
30. 30.🔍 Which is the odd one out? (a) chalk on a gym bar (b) skating on ice (c) a rough doormat (d) sand on a slippery path
31. 31.💪 A bag has a mass of 8 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
32. 32.True or false: a pair of pliers is a class 1 lever (fulcrum in the middle). (a) False (b) True
33. 33.⚖️ A lever bar balances. The load is ? N at 50 cm from the fulcrum. The effort is 500 N at 70 cm from the fulcrum on the other side. What is the missing force in newtons?
34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 2 N, a carpet 4 N, sandpaper 8 N, ice 1 N. Which surface gave the most friction? (a) a wooden plank (b) sandpaper (c) ice (d) a carpet
35. 35.🏋️ A force of 410 N pushes a cart 7 m along the floor. How much work is done, in joules?
36. 36.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 4 N, a carpet 8 N, sandpaper 9 N, a glass sheet 2 N. Which surface gave the most friction? (a) a carpet (b) sandpaper (c) a wooden plank (d) a glass sheet
37. 37.🏋️ A force of 30 N pushes a cart 6 m along the floor. How much work is done, in joules?
38. 38.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2200 N box up it, in newtons? (ideal ramp, no friction)
39. 39.💪 A bag has a mass of 36 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
40. 40.True or false: hitting a cricket ball is a pull. (a) False (b) True

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