Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 582 · 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 seesaw balances. Arjun (? N) sits 2 m from the pivot on one side; Ravi (280 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
2. 2.⚖️ A seesaw balances. Asha (600 N) sits 1 m from the pivot on one side; Kabir (200 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
3. 3.Which of these is a wheel and axle? (a) an axe blade (b) a water tap handle (c) a wheelchair ramp (d) a claw hammer on a nail
4. 4.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) very slowly (d) through a distance
5. 5.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 6 N, sandpaper 7 N, a glass sheet 1 N, a wooden plank 2 N. How many newtons more were needed on sandpaper than on a glass sheet?
6. 6.💪 Is pushing a trolley a push or a pull? (a) a pull (b) a push
7. 7.🛞 More or less friction: chalk on a gym bar? (a) less friction (b) more friction
8. 8.🛞 Is friction helpful or a problem here: walking without slipping? (a) helpful (b) a problem
9. 9.🛞 Why are tyres made with deep treads? (a) to save rubber (b) to grip the road (c) to look nice (d) to go slower
10. 10.⚖️ A seesaw balances. Asha (? N) sits 2 m from the pivot on one side; Zoya (300 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
11. 11.🪝 A pulley system lifts an 840 N load with an effort of 280 N. What is its mechanical advantage (MA)?
12. 12.💪 Which force is at work: rubbing hands warms them? (a) muscular force (b) gravity (c) friction (d) magnetic force
13. 13.⚖️ A lever balances when … (a) both weights are equal (b) turning effects match (c) the bar is short (d) the fulcrum moves
14. 14.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 11 N, ice 1 N, a glass sheet 4 N. Which surface gave the most friction? (a) a glass sheet (b) ice (c) a carpet (d) sandpaper
15. 15.🏋️ A machine lifts a load of 750 N when you push with 150 N. What is its mechanical advantage (MA)?
16. 16.🪝 A pulley system lifts a 120 N load with an effort of 30 N. What is its mechanical advantage (MA)?
17. 17.⚖️ Turning effect = force × … (a) time taken (b) mass of fulcrum (c) colour of bar (d) distance from fulcrum
18. 18.⚖️ A seesaw balances. Ravi (280 N) sits 3 m from the pivot on one side; Kabir (420 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
19. 19.True or false: a seesaw is a lever. (a) False (b) True
20. 20.⚖️ A lever bar balances. The load is ? N at 50 cm from the fulcrum. The effort is 400 N at 30 cm from the fulcrum on the other side. What is the missing force in newtons?
21. 21.🏋️ A machine lifts a load of 720 N when you push with 180 N. What is its mechanical advantage (MA)?
22. 22.💪 Is pressing a doorbell a push or a pull? (a) a push (b) a pull
23. 23.🔍 Which is the odd one out? (a) sand on a slippery path (b) skating on ice (c) chalk on a gym bar (d) a rough doormat
24. 24.🏋️ A machine lifts a load of 200 N when you push with 100 N. What is its mechanical advantage (MA)?
25. 25.⚖️ Going along a lever from one end to the other, the order is: effort, fulcrum, load. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
26. 26.True or false: a tyre with deep treads gives more friction. (a) True (b) False
27. 27.🔍 Which is the odd one out? (a) a grippy rubber sole (b) a smooth steel slide (c) sand on a slippery path (d) chalk on a gym bar
28. 28.🏋️ A machine lifts a load of 120 N when you push with 40 N. What is its mechanical advantage (MA)?
29. 29.True or false: a lemon squeezer is a class 3 lever (effort in the middle). (a) False (b) True
30. 30.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, a carpet 8 N, sandpaper 11 N, a glass sheet 4 N. How many newtons more were needed on sandpaper than on a glass sheet?
31. 31.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, always (c) yes, by half (d) no, work stays the same
32. 32.🏋️ A force of 320 N pushes a cart 5 m along the floor. How much work is done, in joules?
33. 33.Which of these is caused by gravity? (a) an apple falls down (b) squeezing a lemon (c) shoes grip the floor (d) a fridge magnet sticks
34. 34.🪝 Fixed or movable pulley: which one needs effort = load? (a) a fixed pulley (b) a movable pulley
35. 35.⚖️ A lever bar balances. The load is 280 N at 20 cm from the fulcrum. The effort is ? N at 70 cm from the fulcrum on the other side. What is the missing force in newtons?
36. 36.⚖️ A lever bar balances. The load is ? N at 20 cm from the fulcrum. The effort is 180 N at 80 cm from the fulcrum on the other side. What is the missing force in newtons?
37. 37.Which of these is caused by gravity? (a) rubbing hands warms them (b) a rolling ball slows (c) rain falls to the ground (d) a magnet picks up pins
38. 38.⚖️ Which class of lever is a pair of scissors? (a) class 1 (b) class 2 (c) class 3
39. 39.🪝 Fixed or movable pulley: which one stays in one place? (a) a movable pulley (b) a fixed pulley
40. 40.⚙️ Which simple machine is the tip of a nail? (a) wedge (b) inclined plane (c) lever (d) screw

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