Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 850 · 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.🪝 Fixed or movable pulley: which one halves the effort? (a) a fixed pulley (b) a movable pulley
2. 2.⚙️ A wedge is … (a) a rope on a wheel (b) two ramps back to back (c) a bar on a pivot (d) a wheel on a rod
3. 3.🛞 Is friction helpful or a problem here: machine parts heating up? (a) helpful (b) a problem
4. 4.💪 A force is a … (a) kind of colour (b) type of sound (c) unit of time (d) push or a pull
5. 5.⚖️ A seesaw balances. Asha (? N) sits 1 m from the pivot on one side; Kabir (110 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
6. 6.True or false: closing a drawer is a pull. (a) False (b) True
7. 7.💪 A cart is pulled to the right with 65 N and to the left with 70 N. Which way does the net force act? (a) to the right (b) no net force (c) to the left
8. 8.🪝 A bucket weighing 300 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
9. 9.Which of these is an inclined plane? (a) a wood screw (b) a wheelchair ramp (c) a claw hammer on a nail (d) a water tap handle
10. 10.⚖️ A lever bar balances. The load is 540 N at 50 cm from the fulcrum. The effort is 450 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
11. 11.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a glass sheet 7 N, a wooden plank 10 N, a carpet 13 N. How many newtons more were needed on a carpet than on ice?
12. 12.⚖️ A lever bar balances. The load is 120 N at ? cm from the fulcrum. The effort is 150 N at 40 cm from the fulcrum on the other side. What is the missing distance in centimetres?
13. 13.🪝 A pulley system lifts a 120 N load with an effort of 60 N. What is its mechanical advantage (MA)?
14. 14.🛞 Why are tyres made with deep treads? (a) to look nice (b) to grip the road (c) to save rubber (d) to go slower
15. 15.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) far from the fulcrum (b) on the rock (c) on the fulcrum (d) near the fulcrum
16. 16.⚖️ A seesaw balances. Arjun (100 N) sits ? m from the pivot on one side; Kabir (200 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
17. 17.⚖️ Which class of lever is your forearm? (a) class 3 (b) class 2 (c) class 1
18. 18.🏋️ A machine lifts a load of 340 N when you push with 170 N. What is its mechanical advantage (MA)?
19. 19.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 40 cm and the load at 0 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
20. 20.⚖️ A lever bar balances. The load is ? N at 30 cm from the fulcrum. The effort is 240 N at 70 cm from the fulcrum on the other side. What is the missing force in newtons?
21. 21.🔍 Which is the odd one out? (a) a tyre with deep treads (b) a grippy rubber sole (c) chalk on a gym bar (d) powder on a carrom board
22. 22.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load ÷ effort (d) load × effort
23. 23.🔍 Which is the odd one out? (a) a round doorknob (b) a well-bucket rope wheel (c) a steering wheel (d) a well winch handle
24. 24.💪 A bag has a mass of 58 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
25. 25.🔍 Which is the odd one out? (a) a window blind cord (b) a jar lid (c) a wood screw (d) a screw jack
26. 26.💪 Which force pulls everything towards the Earth? (a) friction (b) gravity (c) magnetism (d) wind
27. 27.Which of these is caused by friction? (a) pedalling a cycle (b) shoes grip the floor (c) rain falls to the ground (d) a river flows downhill
28. 28.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 50 cm and the load at 90 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
29. 29.Which of these is caused by magnetic force? (a) rain falls to the ground (b) an apple falls down (c) a fridge magnet sticks (d) squeezing a lemon
30. 30.True or false: hitting a cricket ball is a pull. (a) False (b) True
31. 31.⚖️ On a seesaw, a heavier child should sit … (a) closer to the pivot (b) anywhere (c) on the pivot (d) farther from the pivot
32. 32.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 1 m, how many metres of rope must you pull?
33. 33.True or false: a movable pulley stays in one place. (a) True (b) False
34. 34.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 9 m, how many metres of rope must you pull?
35. 35.💪 Which force is at work: lifting a school bag? (a) magnetic force (b) friction (c) gravity (d) muscular force
36. 36.🪝 Fixed or movable pulley: which one rises with the load? (a) a fixed pulley (b) a movable pulley
37. 37.⚖️ Which class of lever is a nutcracker? (a) class 3 (b) class 1 (c) class 2
38. 38.🛞 More or less friction: oil on a squeaky hinge? (a) more friction (b) less friction
39. 39.⚖️ Which class of lever is a beam balance? (a) class 3 (b) class 1 (c) class 2
40. 40.🏋️ A 20 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

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