Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 579 · 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.⚙️ Which simple machine is a bottle cap? (a) wedge (b) wheel and axle (c) screw (d) inclined plane
2. 2.True or false: a movable pulley is on a flagpole top. (a) True (b) False
3. 3.⚖️ A lever bar balances. The load is 120 N at 20 cm from the fulcrum. The effort is ? N at 30 cm from the fulcrum on the other side. What is the missing force in newtons?
4. 4.Which of these is caused by muscular force? (a) a compass needle turns (b) a magnet picks up pins (c) lifting a school bag (d) a fridge magnet sticks
5. 5.🛞 More or less friction: powder on a carrom board? (a) more friction (b) less friction
6. 6.True or false: a wheelbarrow is a class 2 lever (load in the middle). (a) True (b) False
7. 7.🔍 Which is the odd one out? (a) a rough doormat (b) skating on ice (c) a grippy rubber sole (d) chalk on a gym bar
8. 8.🏋️ A machine lifts a load of 660 N when you push with 110 N. What is its mechanical advantage (MA)?
9. 9.⚖️ A seesaw balances. Meena (200 N) sits ? m from the pivot on one side; Asha (400 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
10. 10.⚖️ Which class of lever is a crowbar? (a) class 2 (b) class 1 (c) class 3
11. 11.True or false: hitting a cricket ball is a push. (a) False (b) True
12. 12.⚖️ A lever bar balances. The load is 630 N at 40 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?
13. 13.🏋️ A force of 20 N did 140 J of work. How many metres did the object move?
14. 14.⚖️ On a seesaw, a heavier child should sit … (a) farther from the pivot (b) on the pivot (c) anywhere (d) closer to the pivot
15. 15.💪 A box weighs 420 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
16. 16.True or false: a road up a hill is a lever. (a) True (b) False
17. 17.Which of these is a pulley? (a) a nutcracker (b) a bottle cap (c) a crane hook block (d) a chisel
18. 18.🪝 A load of 560 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
19. 19.Which of these is a screw? (a) a seesaw (b) an axe blade (c) a wood screw (d) a steering wheel
20. 20.💪 Is plucking a mango a push or a pull? (a) a push (b) a pull
21. 21.⚙️ Which simple machine is an axe blade? (a) wedge (b) lever (c) wheel and axle (d) pulley
22. 22.⚖️ Along a straight bar, measured from the left end, the effort is at 60 cm, the fulcrum at 100 cm and the load at 30 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
23. 23.💪 Is hitting a cricket ball a push or a pull? (a) a pull (b) a push
24. 24.💪 A cart is pulled to the right with 60 N and to the left with 45 N. Which way does the net force act? (a) no net force (b) to the left (c) to the right
25. 25.🏋️ A force of 250 N did 500 J of work. How many metres did the object move?
26. 26.💪 Which force is at work: a compass needle turns? (a) magnetic force (b) muscular force (c) friction (d) gravity
27. 27.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 11 N, ice 4 N, a wooden plank 7 N, a carpet 8 N. How many newtons more were needed on sandpaper than on ice?
28. 28.⚖️ A seesaw balances. Zoya (510 N) sits ? m from the pivot on one side; Asha (680 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
29. 29.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) load ÷ effort (d) effort ÷ load
30. 30.💪 Two children push a box to the right, one with 60 N and the other with 45 N. What is the net (total) force on the box, in newtons?
31. 31.🔍 Which is the odd one out? (a) a box pushed on carpet (b) a rough doormat (c) a tyre with deep treads (d) powder on a carrom board
32. 32.🪝 A pulley system lifts an 870 N load with an effort of 290 N. What is its mechanical advantage (MA)?
33. 33.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 450 N box up it, in newtons? (ideal ramp, no friction)
34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 2 N, a carpet 4 N, sandpaper 7 N. Which surface gave the least friction? (a) a carpet (b) ice (c) sandpaper (d) a glass sheet
35. 35.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a fixed pulley (b) a movable pulley
36. 36.💪 Two children push a box to the right, one with 95 N and the other with 30 N. What is the net (total) force on the box, in newtons?
37. 37.🔍 Which is the odd one out? (a) a smooth steel slide (b) a tyre with deep treads (c) powder on a carrom board (d) skating on ice
38. 38.True or false: pressing a doorbell is a push. (a) True (b) False
39. 39.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, a carpet 10 N, sandpaper 14 N, ice 3 N. Which surface gave the most friction? (a) ice (b) sandpaper (c) a wooden plank (d) a carpet
40. 40.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) helpful (b) a problem

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