Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 519 · 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.💪 Is pushing a swing a push or a pull? (a) a pull (b) a push
2. 2.⚖️ A seesaw balances. Meena (? N) sits 4 m from the pivot on one side; Asha (720 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
3. 3.💪 Which force is at work: a compass needle turns? (a) gravity (b) magnetic force (c) friction (d) muscular force
4. 4.🛞 More or less friction: powder on a carrom board? (a) less friction (b) more friction
5. 5.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
6. 6.💪 Is a tug of war a push or a pull? (a) a push (b) a pull
7. 7.🏋️ A force of 30 N pushes a cart 3 m along the floor. How much work is done, in joules?
8. 8.🔍 Which is the odd one out? (a) a wet tiled floor (b) a box pushed on carpet (c) a grippy rubber sole (d) a tyre with deep treads
9. 9.Which of these is caused by magnetic force? (a) an apple falls down (b) a rolling ball slows (c) rain falls to the ground (d) a fridge magnet sticks
10. 10.⚙️ Which simple machine is a jar lid? (a) wheel and axle (b) screw (c) lever (d) pulley
11. 11.⚖️ A lever bar balances. The load is ? N at 50 cm from the fulcrum. The effort is 300 N at 100 cm from the fulcrum on the other side. What is the missing force in newtons?
12. 12.🪝 What does a single fixed pulley change? (a) the colour of rope (b) the direction of pull (c) the size of the load (d) gravity
13. 13.⚙️ Most simple machines make work easier by letting us … (a) switch off gravity (b) stop all friction (c) make new energy (d) use a smaller force
14. 14.💪 A box weighs 540 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
15. 15.⚖️ On a seesaw, a heavier child should sit … (a) farther from the pivot (b) on the pivot (c) closer to the pivot (d) anywhere
16. 16.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 40 cm and the load at 70 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
17. 17.⚖️ A seesaw balances. Arjun (480 N) sits 2 m from the pivot on one side; Asha (? N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
18. 18.⚖️ A seesaw balances. Meena (720 N) sits 3 m from the pivot on one side; Arjun (? N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
19. 19.⚖️ In a class 3 lever, what is in the middle? (a) the fulcrum (b) the pulley (c) the effort (d) the load
20. 20.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) on the fulcrum (b) near the fulcrum (c) far from the fulcrum (d) on the rock
21. 21.🛞 More or less friction: a smooth steel slide? (a) more friction (b) less friction
22. 22.⚖️ A lever bar balances. The load is 280 N at ? cm from the fulcrum. The effort is 40 N at 70 cm from the fulcrum on the other side. What is the missing distance in centimetres?
23. 23.🪝 A pulley system has 3 rope sections holding up the load. To lift the load by 1 m, how many metres of rope must you pull?
24. 24.💪 Two children push a box to the right, one with 20 N and the other with 5 N. What is the net (total) force on the box, in newtons?
25. 25.💪 Which force is at work: lifting a school bag? (a) magnetic force (b) friction (c) muscular force (d) gravity
26. 26.🔍 Which is the odd one out? (a) powder on a carrom board (b) a wet tiled floor (c) chalk on a gym bar (d) skating on ice
27. 27.True or false: a fixed pulley stays in one place. (a) True (b) False
28. 28.⚖️ A lever bar balances. The load is 100 N at 10 cm from the fulcrum. The effort is 20 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
29. 29.True or false: a rough doormat gives less friction. (a) True (b) False
30. 30.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 10 N, ice 1 N, a glass sheet 4 N, a wooden plank 7 N. Which surface gave the most friction? (a) a glass sheet (b) a carpet (c) ice (d) a wooden plank
31. 31.💪 Which force is at work: rubbing hands warms them? (a) gravity (b) magnetic force (c) muscular force (d) friction
32. 32.⚖️ A seesaw balances. Arjun (? N) sits 3 m from the pivot on one side; Kabir (480 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
33. 33.True or false: a fixed pulley needs effort = load. (a) True (b) False
34. 34.🪝 Fixed or movable pulley: which one rises with the load? (a) a movable pulley (b) a fixed pulley
35. 35.💪 A box weighs 70 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
36. 36.⚖️ In a class 1 lever, what is in the middle? (a) nothing (b) the fulcrum (c) the effort (d) the load
37. 37.💪 In a tug of war, one team pulls right with 75 N and the other pulls left with 10 N. What is the size of the net force, in newtons?
38. 38.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) helpful (b) a problem
39. 39.⚖️ A seesaw balances. Zoya (480 N) sits 1 m from the pivot on one side; Arjun (? N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
40. 40.Which of these is caused by gravity? (a) a magnet picks up pins (b) a fridge magnet sticks (c) an apple falls down (d) a compass needle turns

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