Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 777 · 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.🔍 Which is the odd one out? (a) a well-bucket rope wheel (b) a wood screw (c) a window blind cord (d) a crane hook block
2. 2.⚙️ A wedge is … (a) a wheel on a rod (b) a bar on a pivot (c) a rope on a wheel (d) two ramps back to back
3. 3.🛞 More or less friction: skating on ice? (a) more friction (b) less friction
4. 4.🛞 Is friction helpful or a problem here: walking without slipping? (a) helpful (b) a problem
5. 5.🏋️ A longer ramp to the same height needs … (a) no effort (b) more effort (c) the same effort (d) less effort
6. 6.🪝 What does a single fixed pulley change? (a) the size of the load (b) gravity (c) the colour of rope (d) the direction of pull
7. 7.Which of these is a pulley? (a) a window blind cord (b) a bottle opener (c) a water tap handle (d) a road up a hill
8. 8.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 3 N, a carpet 6 N, sandpaper 7 N. How many newtons more were needed on sandpaper than on ice?
9. 9.🪝 A pulley system lifts a 220 N load with an effort of 110 N. What is its mechanical advantage (MA)?
10. 10.💪 Which force is at work: a thrown ball comes down? (a) friction (b) magnetic force (c) muscular force (d) gravity
11. 11.💪 Is pressing a doorbell a push or a pull? (a) a pull (b) a push
12. 12.True or false: closing a drawer is a push. (a) True (b) False
13. 13.True or false: a fixed pulley hangs on the rope loop. (a) True (b) False
14. 14.⚖️ A lever bar balances. The load is 160 N at ? cm from the fulcrum. The effort is 40 N at 80 cm from the fulcrum on the other side. What is the missing distance in centimetres?
15. 15.True or false: a knife edge is a wedge. (a) True (b) False
16. 16.True or false: your forearm is a class 3 lever (effort in the middle). (a) False (b) True
17. 17.⚖️ A seesaw balances. Ravi (? N) sits 2 m from the pivot on one side; Zoya (260 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
18. 18.Which of these is caused by friction? (a) pedalling a cycle (b) an apple falls down (c) brakes stop a bicycle (d) lifting a school bag
19. 19.🔍 Which is the odd one out? (a) a flagpole rope wheel (b) a well-bucket rope wheel (c) an axe blade (d) a crane hook block
20. 20.True or false: a seesaw is a lever. (a) False (b) True
21. 21.⚖️ A seesaw balances. Meena (? N) sits 3 m from the pivot on one side; Kabir (390 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
22. 22.⚖️ A seesaw balances. Ravi (? N) sits 1 m from the pivot on one side; Meena (170 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
23. 23.🔍 Which is the odd one out? (a) a steering wheel (b) a door stopper (c) a round doorknob (d) a well winch handle
24. 24.⚖️ A seesaw balances. Zoya (300 N) sits ? m from the pivot on one side; Arjun (100 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
25. 25.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 9 N, ice 3 N, a glass sheet 5 N, a wooden plank 7 N. Which surface gave the most friction? (a) a glass sheet (b) sandpaper (c) a wooden plank (d) ice
26. 26.⚖️ A lever bar balances. The load is 100 N at ? cm from the fulcrum. The effort is 250 N at 20 cm from the fulcrum on the other side. What is the missing distance in centimetres?
27. 27.Which of these is caused by friction? (a) a compass needle turns (b) rain falls to the ground (c) shoes grip the floor (d) a fridge magnet sticks
28. 28.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3400 N box up it, in newtons? (ideal ramp, no friction)
29. 29.True or false: a claw hammer on a nail is a pulley. (a) False (b) True
30. 30.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) load ÷ effort (d) effort ÷ load
31. 31.⚙️ Which simple machine is a nut and bolt? (a) screw (b) inclined plane (c) lever (d) wheel and axle
32. 32.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 0 cm and the load at 10 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
33. 33.⚖️ A seesaw balances. Asha (? N) sits 4 m from the pivot on one side; Meena (760 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
34. 34.💪 Which force pulls everything towards the Earth? (a) gravity (b) wind (c) magnetism (d) friction
35. 35.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) watt hour (d) metre (m)
36. 36.⚖️ Which class of lever is a nutcracker? (a) class 2 (b) class 1 (c) class 3
37. 37.⚖️ A lever bar balances. The load is 300 N at 20 cm from the fulcrum. The effort is 100 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
38. 38.🪝 A well winch has a handle (wheel) of radius 28 cm turning an axle of radius 4 cm. What is its mechanical advantage (MA)?
39. 39.💪 Which force is at work: pedalling a cycle? (a) muscular force (b) friction (c) gravity (d) magnetic force
40. 40.🔍 Which is the odd one out? (a) a bottle opener (b) a seesaw (c) a road up a hill (d) a crowbar

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