Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 131 · 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.⚖️ Turning effect = force × … (a) colour of bar (b) mass of fulcrum (c) distance from fulcrum (d) time taken
2. 2.🔍 Which is the odd one out? (a) a crane hook block (b) a well-bucket rope wheel (c) a nutcracker (d) a window blind cord
3. 3.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) no, work stays the same (d) only on Mondays
4. 4.Which of these is caused by gravity? (a) shoes grip the floor (b) pedalling a cycle (c) a fridge magnet sticks (d) rain falls to the ground
5. 5.⚖️ A lever bar balances. The load is 240 N at 20 cm from the fulcrum. The effort is 60 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
6. 6.🔍 Which is the odd one out? (a) a box pushed on carpet (b) a rough doormat (c) a wet tiled floor (d) chalk on a gym bar
7. 7.True or false: a movable pulley stays in one place. (a) True (b) False
8. 8.🔍 Which is the odd one out? (a) a claw hammer on a nail (b) a seesaw (c) a flagpole rope wheel (d) a bottle opener
9. 9.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 3 N, a carpet 7 N, sandpaper 8 N, ice 2 N. Which surface gave the most friction? (a) sandpaper (b) a wooden plank (c) ice (d) a carpet
10. 10.🏋️ A force of 350 N pushes a cart 2 m along the floor. How much work is done, in joules?
11. 11.⚖️ A seesaw balances. Arjun (120 N) sits ? m from the pivot on one side; Meena (240 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
12. 12.True or false: chalk on a gym bar gives more friction. (a) False (b) True
13. 13.🪝 A pulley system lifts a 100 N load with an effort of 50 N. What is its mechanical advantage (MA)?
14. 14.⚖️ A seesaw balances. Zoya (100 N) sits 1 m from the pivot on one side; Asha (? N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
15. 15.True or false: a grippy rubber sole gives less friction. (a) True (b) False
16. 16.True or false: a crowbar is a pulley. (a) True (b) False
17. 17.⚖️ A seesaw balances. Ravi (330 N) sits 4 m from the pivot on one side; Kabir (? N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
18. 18.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) helpful (b) a problem
19. 19.⚙️ Which simple machine is a playground slide? (a) wheel and axle (b) lever (c) pulley (d) inclined plane
20. 20.⚖️ A lever bar balances. The load is ? N at 20 cm from the fulcrum. The effort is 200 N at 90 cm from the fulcrum on the other side. What is the missing force in newtons?
21. 21.💪 A bag has a mass of 47 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
22. 22.⚙️ Which simple machine is a jar lid? (a) pulley (b) wheel and axle (c) screw (d) inclined plane
23. 23.🏋️ A 16 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
24. 24.⚖️ In a class 2 lever, what is in the middle? (a) the axle (b) the effort (c) the fulcrum (d) the load
25. 25.🛞 Rubbing your hands fast makes them … (a) cold (b) warm (c) magnetic (d) wet
26. 26.🔍 Which is the odd one out? (a) a flagpole rope wheel (b) a crane hook block (c) a well-bucket rope wheel (d) a bottle opener
27. 27.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
28. 28.💪 Two children push a box to the right, one with 100 N and the other with 65 N. What is the net (total) force on the box, in newtons?
29. 29.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 4 N, a carpet 6 N, sandpaper 7 N, a glass sheet 3 N. Which surface gave the most friction? (a) a glass sheet (b) sandpaper (c) a carpet (d) a wooden plank
30. 30.💪 Is hitting a cricket ball a push or a pull? (a) a push (b) a pull
31. 31.⚙️ Which simple machine is a well-bucket rope wheel? (a) lever (b) pulley (c) inclined plane (d) wheel and axle
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: pushing a trolley is a push. (a) True (b) False
34. 34.🪝 Fixed or movable pulley: which one needs effort = load? (a) a movable pulley (b) a fixed pulley
35. 35.🔍 Which is the odd one out? (a) a steering wheel (b) a well winch handle (c) a round doorknob (d) a crowbar
36. 36.True or false: a pair of kitchen tongs is a class 3 lever (effort in the middle). (a) True (b) False
37. 37.💪 Which force pulls everything towards the Earth? (a) friction (b) gravity (c) wind (d) magnetism
38. 38.True or false: a movable pulley only changes direction. (a) True (b) False
39. 39.🪝 Fixed or movable pulley: which one only changes direction? (a) a movable pulley (b) a fixed pulley
40. 40.⚖️ On a seesaw, a heavier child should sit … (a) anywhere (b) closer to the pivot (c) farther from the pivot (d) on the pivot

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