Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 617 · 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.⚖️ What is the pivot point of a lever called? (a) the load (b) the fulcrum (c) the effort (d) the axle
2. 2.⚖️ A lever bar balances. The load is 350 N at ? cm from the fulcrum. The effort is 350 N at 50 cm from the fulcrum on the other side. What is the missing distance in centimetres?
3. 3.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) joule (J) (d) watt hour
4. 4.True or false: opening a drawer is a pull. (a) False (b) True
5. 5.⚖️ Going along a lever from one end to the other, the order is: fulcrum, effort, load. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
6. 6.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) through a distance (d) only upwards
7. 7.🪝 A winch has a wheel of radius 14 cm and an axle of radius 2 cm. What effort on the wheel lifts a 1190 N bucket on the axle, in newtons? (ideal)
8. 8.⚖️ A lever bar balances. The load is 630 N at 10 cm from the fulcrum. The effort is ? N at 90 cm from the fulcrum on the other side. What is the missing force in newtons?
9. 9.True or false: a movable pulley stays in one place. (a) True (b) False
10. 10.⚖️ On a seesaw, a heavier child should sit … (a) on the pivot (b) closer to the pivot (c) anywhere (d) farther from the pivot
11. 11.💪 Which force is at work: rubbing hands warms them? (a) friction (b) magnetic force (c) gravity (d) muscular force
12. 12.🔍 Which is the odd one out? (a) a truck loading ramp (b) a bottle opener (c) a wheelchair ramp (d) a road up a hill
13. 13.⚖️ A lever balances when … (a) turning effects match (b) the bar is short (c) both weights are equal (d) the fulcrum moves
14. 14.⚙️ Which simple machine is a road up a hill? (a) wedge (b) lever (c) inclined plane (d) wheel and axle
15. 15.🪝 Fixed or movable pulley: which one needs effort = load? (a) a movable pulley (b) a fixed pulley
16. 16.⚙️ Which simple machine is a wheelchair ramp? (a) inclined plane (b) lever (c) wheel and axle (d) screw
17. 17.⚙️ Which simple machine is a door stopper? (a) wheel and axle (b) wedge (c) lever (d) inclined plane
18. 18.Which of these is caused by muscular force? (a) a rolling ball slows (b) a thrown ball comes down (c) brakes stop a bicycle (d) lifting a school bag
19. 19.⚙️ Which simple machine is a round doorknob? (a) pulley (b) lever (c) inclined plane (d) wheel and axle
20. 20.⚖️ A seesaw balances. Ravi (? N) sits 2 m from the pivot on one side; Kabir (380 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
21. 21.🛞 More or less friction: skating on ice? (a) less friction (b) more friction
22. 22.⚖️ In a class 3 lever, what is in the middle? (a) the load (b) the fulcrum (c) the pulley (d) the effort
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, ice 2 N, a glass sheet 3 N, a wooden plank 7 N. Which surface gave the least friction? (a) ice (b) a wooden plank (c) a glass sheet (d) a carpet
24. 24.True or false: a smooth steel slide gives less friction. (a) True (b) False
25. 25.⚖️ A lever bar balances. The load is 120 N at ? cm from the fulcrum. The effort is 120 N at 20 cm from the fulcrum on the other side. What is the missing distance in centimetres?
26. 26.🪝 A winch has a wheel of radius 4 cm and an axle of radius 2 cm. What effort on the wheel lifts a 260 N bucket on the axle, in newtons? (ideal)
27. 27.⚙️ Which simple machine is a well-bucket rope wheel? (a) screw (b) wedge (c) pulley (d) wheel and axle
28. 28.⚙️ Which simple machine is a chisel? (a) wheel and axle (b) inclined plane (c) pulley (d) wedge
29. 29.⚙️ Most simple machines make work easier by letting us … (a) switch off gravity (b) make new energy (c) use a smaller force (d) stop all friction
30. 30.💪 Two children push a box to the right, one with 45 N and the other with 5 N. What is the net (total) force on the box, in newtons?
31. 31.⚖️ A lever bar balances. The load is ? N at 50 cm from the fulcrum. The effort is 350 N at 50 cm from the fulcrum on the other side. What is the missing force in newtons?
32. 32.💪 Which force is at work: a fridge magnet sticks? (a) gravity (b) friction (c) muscular force (d) magnetic force
33. 33.True or false: a fixed pulley makes you pull 2× rope. (a) True (b) False
34. 34.⚖️ A seesaw balances. Ravi (570 N) sits 4 m from the pivot on one side; Kabir (760 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
35. 35.⚖️ Turning effect = force × … (a) time taken (b) distance from fulcrum (c) colour of bar (d) mass of fulcrum
36. 36.⚖️ A seesaw balances. Asha (? N) sits 3 m from the pivot on one side; Arjun (510 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
37. 37.💪 A box weighs 510 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
38. 38.True or false: a movable pulley only changes direction. (a) True (b) False
39. 39.🪝 More rope sections holding a load means … (a) no change (b) the load floats (c) more effort needed (d) less effort needed
40. 40.💪 In a tug of war, one team pulls left with 70 N and the other pulls right with 60 N. What is the size of the net force, in newtons?

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