Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 30 · 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 force of 360 N did 2520 J of work. How many metres did the object move?
2. 2.🔍 Which is the odd one out? (a) a rough doormat (b) skating on ice (c) oil on a squeaky hinge (d) powder on a carrom board
3. 3.🪝 A well winch has a handle (wheel) of radius 5 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
4. 4.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
5. 5.Which of these is a wedge? (a) a door stopper (b) a wheelchair ramp (c) a bottle opener (d) a road up a hill
6. 6.Which of these is caused by gravity? (a) a compass needle turns (b) a magnet picks up pins (c) shoes grip the floor (d) a thrown ball comes down
7. 7.True or false: a bottle opener is a class 1 lever (fulcrum in the middle). (a) True (b) False
8. 8.⚖️ A lever balances when … (a) both weights are equal (b) turning effects match (c) the bar is short (d) the fulcrum moves
9. 9.💪 Two equal forces push on a box from opposite sides. They are … (a) gravity (b) balanced (c) doubled (d) unbalanced
10. 10.💪 Which can a force NOT do? (a) start it moving (b) stop it moving (c) change its colour (d) change its shape
11. 11.True or false: a wet tiled floor gives more friction. (a) True (b) False
12. 12.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, sandpaper 7 N, ice 3 N, a glass sheet 5 N. Which surface gave the most friction? (a) a wooden plank (b) ice (c) sandpaper (d) a glass sheet
13. 13.True or false: a well winch handle is a wheel and axle. (a) True (b) False
14. 14.🪝 Fixed or movable pulley: which one rises with the load? (a) a fixed pulley (b) a movable pulley
15. 15.🪝 A pulley system has 2 rope sections holding up the load. To lift the load by 9 m, how many metres of rope must you pull?
16. 16.🪝 A winch has a wheel of radius 35 cm and an axle of radius 5 cm. What effort on the wheel lifts a 1260 N bucket on the axle, in newtons? (ideal)
17. 17.⚖️ A seesaw balances. Arjun (130 N) sits ? m from the pivot on one side; Zoya (260 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
18. 18.🪝 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?
19. 19.⚙️ Which simple machine is a truck loading ramp? (a) inclined plane (b) screw (c) pulley (d) wheel and axle
20. 20.💪 Is kicking a football a push or a pull? (a) a push (b) a pull
21. 21.🛞 More or less friction: skating on ice? (a) more friction (b) less friction
22. 22.⚙️ Which simple machine is a claw hammer on a nail? (a) lever (b) inclined plane (c) wedge (d) pulley
23. 23.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) a tyre with deep treads (c) a wheel on ball bearings (d) skating on ice
24. 24.⚖️ A lever bar balances. The load is ? N at 20 cm from the fulcrum. The effort is 200 N at 40 cm from the fulcrum on the other side. What is the missing force in newtons?
25. 25.⚙️ How many simple machines are there in the usual list? (a) 6 (b) 3 (c) 12 (d) 10
26. 26.⚖️ Which class of lever is a nutcracker? (a) class 3 (b) class 2 (c) class 1
27. 27.True or false: a bottle cap is a screw. (a) False (b) True
28. 28.💪 Is closing a drawer a push or a pull? (a) a pull (b) a push
29. 29.⚖️ Which class of lever is a bottle opener? (a) class 3 (b) class 2 (c) class 1
30. 30.⚖️ Which class of lever is a lemon squeezer? (a) class 3 (b) class 1 (c) class 2
31. 31.True or false: a box pushed on carpet gives less friction. (a) False (b) True
32. 32.🪝 A pulley system has 3 rope sections holding up the load. To lift the load by 2 m, how many metres of rope must you pull?
33. 33.🪝 Fixed or movable pulley: which one halves the effort? (a) a fixed pulley (b) a movable pulley
34. 34.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 80 N at 100 cm from the fulcrum on the other side. What is the missing force in newtons?
35. 35.⚖️ Which class of lever is a crowbar? (a) class 1 (b) class 2 (c) class 3
36. 36.🏋️ A 6 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
37. 37.True or false: a fixed pulley stays in one place. (a) True (b) False
38. 38.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
39. 39.🪝 A pulley system lifts a 900 N load with an effort of 300 N. What is its mechanical advantage (MA)?
40. 40.⚖️ Which class of lever is a pair of scissors? (a) class 3 (b) class 2 (c) class 1

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