Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 105 · 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 box weighs 510 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
2. 2.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) no, work stays the same (c) yes, by half (d) yes, always
3. 3.Which of these is caused by muscular force? (a) shoes grip the floor (b) a compass needle turns (c) rubbing hands warms them (d) lifting a school bag
4. 4.⚖️ A lever bar balances. The load is 150 N at ? cm from the fulcrum. The effort is 120 N at 50 cm from the fulcrum on the other side. What is the missing distance in centimetres?
5. 5.True or false: pushing a swing is a pull. (a) True (b) False
6. 6.⚙️ Which simple machine is a water tap handle? (a) wheel and axle (b) wedge (c) screw (d) lever
7. 7.🪝 Fixed or movable pulley: which one only changes direction? (a) a movable pulley (b) a fixed pulley
8. 8.True or false: a movable pulley makes you pull 2× rope. (a) False (b) True
9. 9.⚖️ A lever bar balances. The load is ? N at 40 cm from the fulcrum. The effort is 80 N at 70 cm from the fulcrum on the other side. What is the missing force in newtons?
10. 10.⚖️ A seesaw balances. Asha (400 N) sits 2 m from the pivot on one side; Kabir (? N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
11. 11.💪 A cart is pulled to the right with 70 N and to the left with 55 N. Which way does the net force act? (a) to the right (b) no net force (c) to the left
12. 12.🛞 Which surface gives the MOST friction to a sliding block? (a) glass (b) sandpaper (c) ice (d) polished marble
13. 13.Which of these is a wheel and axle? (a) a water tap handle (b) a bottle cap (c) a flagpole rope wheel (d) a bottle opener
14. 14.🏋️ A machine lifts a load of 1080 N when you push with 180 N. What is its mechanical advantage (MA)?
15. 15.🪝 Fixed or movable pulley: which one stays in one place? (a) a fixed pulley (b) a movable pulley
16. 16.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) a problem (b) helpful
17. 17.True or false: sand on a slippery path gives more friction. (a) True (b) False
18. 18.💪 A bag has a mass of 6 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
19. 19.⚖️ Which class of lever is a wheelbarrow? (a) class 1 (b) class 3 (c) class 2
20. 20.⚖️ Which class of lever is a broom when sweeping? (a) class 1 (b) class 2 (c) class 3
21. 21.True or false: a tug of war is a push. (a) True (b) False
22. 22.True or false: a movable pulley is on a flagpole top. (a) True (b) False
23. 23.🛞 More or less friction: chalk on a gym bar? (a) less friction (b) more friction
24. 24.True or false: pulling up your socks is a pull. (a) False (b) True
25. 25.True or false: a door stopper is a wedge. (a) False (b) True
26. 26.🛞 How can we reduce friction in a machine? (a) oil the moving parts (b) make parts rough (c) press parts harder (d) add sand
27. 27.🏋️ A machine lifts a load of 260 N when you push with 130 N. What is its mechanical advantage (MA)?
28. 28.🔍 Which is the odd one out? (a) a jar lid (b) the tip of a nail (c) a bottle cap (d) a nut and bolt
29. 29.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load × effort (c) load + effort (d) effort ÷ load
30. 30.⚖️ A seesaw balances. Asha (300 N) sits ? m from the pivot on one side; Arjun (300 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
31. 31.💪 Two equal forces push on a box from opposite sides. They are … (a) gravity (b) unbalanced (c) doubled (d) balanced
32. 32.💪 Which force is at work: pedalling a cycle? (a) friction (b) magnetic force (c) muscular force (d) gravity
33. 33.🏋️ A machine lifts a load of 420 N when you push with 140 N. What is its mechanical advantage (MA)?
34. 34.⚖️ A lever bar balances. The load is 100 N at ? cm from the fulcrum. The effort is 60 N at 50 cm from the fulcrum on the other side. What is the missing distance in centimetres?
35. 35.🪝 A pulley system lifts a 570 N load with an effort of 190 N. What is its mechanical advantage (MA)?
36. 36.⚖️ A seesaw balances. Zoya (480 N) sits 3 m from the pivot on one side; Asha (? N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
37. 37.🏋️ A machine lifts a load of 200 N when you push with 50 N. What is its mechanical advantage (MA)?
38. 38.🪝 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?
39. 39.🪝 A winch has a wheel of radius 4 cm and an axle of radius 2 cm. What effort on the wheel lifts a 300 N bucket on the axle, in newtons? (ideal)
40. 40.⚖️ A seesaw balances. Kabir (680 N) sits ? m from the pivot on one side; Arjun (680 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?

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