Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 909 · 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.⚖️ Going along a lever from one end to the other, the order is: load, effort, fulcrum. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
2. 2.🛞 Rubbing your hands fast makes them … (a) magnetic (b) cold (c) warm (d) wet
3. 3.🪝 A pulley system lifts a 260 N load with an effort of 130 N. What is its mechanical advantage (MA)?
4. 4.🛞 More or less friction: skating on ice? (a) more friction (b) less friction
5. 5.💪 A force is a … (a) push or a pull (b) unit of time (c) type of sound (d) kind of colour
6. 6.🪝 A winch has a wheel of radius 18 cm and an axle of radius 3 cm. What effort on the wheel lifts an 840 N bucket on the axle, in newtons? (ideal)
7. 7.🔍 Which is the odd one out? (a) a window blind cord (b) a well-bucket rope wheel (c) a screw jack (d) a flagpole rope wheel
8. 8.⚖️ 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
9. 9.True or false: pressing a doorbell is a push. (a) False (b) True
10. 10.🏋️ A force of 460 N pushes a cart 7 m along the floor. How much work is done, in joules?
11. 11.True or false: a pair of pliers is a class 3 lever (effort in the middle). (a) False (b) True
12. 12.🪝 What does a single fixed pulley change? (a) the size of the load (b) the direction of pull (c) the colour of rope (d) gravity
13. 13.⚖️ In a class 2 lever, what is in the middle? (a) the effort (b) the axle (c) the load (d) the fulcrum
14. 14.True or false: a wet tiled floor gives more friction. (a) True (b) False
15. 15.⚖️ A seesaw balances. Ravi (? N) sits 4 m from the pivot on one side; Arjun (400 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
16. 16.Which of these is an inclined plane? (a) a screw jack (b) a steering wheel (c) a nut and bolt (d) a wheelchair ramp
17. 17.🏋️ Pushing a crate 1 m took 300 J of work. What force was used, in newtons?
18. 18.🪝 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?
19. 19.🔍 Which is the odd one out? (a) sand on a slippery path (b) a tyre with deep treads (c) a box pushed on carpet (d) powder on a carrom board
20. 20.🏋️ A force of 90 N pushes a cart 8 m along the floor. How much work is done, in joules?
21. 21.🪝 Fixed or movable pulley: which one stays in one place? (a) a movable pulley (b) a fixed pulley
22. 22.⚖️ Turning effect = force × … (a) distance from fulcrum (b) mass of fulcrum (c) time taken (d) colour of bar
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 6 N, ice 2 N, a glass sheet 4 N, a wooden plank 5 N. Which surface gave the least friction? (a) a carpet (b) a glass sheet (c) ice (d) a wooden plank
24. 24.⚖️ Which class of lever is a fishing rod? (a) class 2 (b) class 3 (c) class 1
25. 25.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, sandpaper 7 N, ice 1 N, a glass sheet 2 N. Which surface gave the least friction? (a) a wooden plank (b) sandpaper (c) a glass sheet (d) ice
26. 26.⚖️ A seesaw balances. Ravi (420 N) sits 4 m from the pivot on one side; Kabir (560 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
27. 27.💪 Which force pulls everything towards the Earth? (a) magnetism (b) gravity (c) wind (d) friction
28. 28.🪝 More rope sections holding a load means … (a) no change (b) more effort needed (c) less effort needed (d) the load floats
29. 29.⚖️ A lever bar balances. The load is 360 N at 40 cm from the fulcrum. The effort is 160 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
30. 30.⚖️ Going along a lever from one end to the other, the order is: fulcrum, load, effort. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
31. 31.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) metre (m) (d) watt hour
32. 32.True or false: chalk on a gym bar gives less friction. (a) True (b) False
33. 33.Which of these is caused by friction? (a) squeezing a lemon (b) brakes stop a bicycle (c) a compass needle turns (d) a magnet picks up pins
34. 34.⚖️ Which class of lever is a seesaw? (a) class 3 (b) class 2 (c) class 1
35. 35.True or false: a movable pulley makes you pull 2× rope. (a) False (b) True
36. 36.⚖️ A seesaw balances. Asha (120 N) sits 2 m from the pivot on one side; Ravi (? N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
37. 37.🔍 Which is the odd one out? (a) a nutcracker (b) a seesaw (c) a bottle opener (d) a water tap handle
38. 38.⚖️ A seesaw balances. Arjun (480 N) sits 2 m from the pivot on one side; Kabir (320 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
39. 39.💪 A box weighs 500 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
40. 40.⚖️ A seesaw balances. Arjun (510 N) sits 3 m from the pivot on one side; Meena (? N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?

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