Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 952 · 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: effort, fulcrum, load. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
2. 2.Which of these is an inclined plane? (a) a nutcracker (b) a water tap handle (c) a bottle cap (d) a truck loading ramp
3. 3.⚖️ 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
4. 4.⚖️ A seesaw balances. Kabir (? N) sits 4 m from the pivot on one side; Meena (400 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
5. 5.Which of these is caused by gravity? (a) lifting a school bag (b) a rolling ball slows (c) rain falls to the ground (d) brakes stop a bicycle
6. 6.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 10 N, sandpaper 14 N, ice 4 N, a glass sheet 7 N. Which surface gave the most friction? (a) a glass sheet (b) a carpet (c) sandpaper (d) ice
7. 7.⚙️ Which simple machine is a screw jack? (a) screw (b) pulley (c) lever (d) wheel and axle
8. 8.🏋️ A machine lifts a load of 90 N when you push with 30 N. What is its mechanical advantage (MA)?
9. 9.True or false: a bottle cap is a pulley. (a) False (b) True
10. 10.🏋️ Pushing a crate 1 m took 120 J of work. What force was used, in newtons?
11. 11.🪝 A load of 400 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
12. 12.⚖️ A lever bar balances. The load is 300 N at ? cm from the fulcrum. The effort is 30 N at 100 cm from the fulcrum on the other side. What is the missing distance in centimetres?
13. 13.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, a carpet 6 N, sandpaper 9 N, a glass sheet 2 N. Which surface gave the most friction? (a) a glass sheet (b) sandpaper (c) a carpet (d) a wooden plank
14. 14.True or false: a wheelbarrow is a class 2 lever (load in the middle). (a) False (b) True
15. 15.💪 A cart is pulled to the right with 70 N and to the left with 85 N. Which way does the net force act? (a) no net force (b) to the left (c) to the right
16. 16.🪝 A wheel and axle is a big wheel fixed to … (a) a sharp wedge (b) a loose rope (c) a smaller rod (axle) (d) a flat ramp
17. 17.🛞 More or less friction: chalk on a gym bar? (a) less friction (b) more friction
18. 18.🔍 Which is the odd one out? (a) a wheelchair ramp (b) a playground slide (c) a truck loading ramp (d) a steering wheel
19. 19.💪 Is plucking a mango a push or a pull? (a) a pull (b) a push
20. 20.🏋️ Work is done when a force moves something … (a) through a distance (b) without moving it (c) only upwards (d) very slowly
21. 21.💪 Which force is at work: shoes grip the floor? (a) friction (b) muscular force (c) gravity (d) magnetic force
22. 22.⚖️ On a seesaw, a heavier child should sit … (a) closer to the pivot (b) farther from the pivot (c) anywhere (d) on the pivot
23. 23.🔍 Which is the odd one out? (a) a flagpole rope wheel (b) a crane hook block (c) a well-bucket rope wheel (d) a jar lid
24. 24.💪 In which unit do we measure force? (a) second (s) (b) newton (N) (c) metre (m) (d) litre (L)
25. 25.🪝 A well winch has a handle (wheel) of radius 3 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
26. 26.💪 Which force is at work: a rolling ball slows? (a) friction (b) muscular force (c) magnetic force (d) gravity
27. 27.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 20 cm and the load at 0 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
28. 28.True or false: a tyre with deep treads gives more friction. (a) False (b) True
29. 29.🛞 More or less friction: a box pushed on carpet? (a) less friction (b) more friction
30. 30.⚖️ Turning effect = force × … (a) mass of fulcrum (b) colour of bar (c) distance from fulcrum (d) time taken
31. 31.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 60 cm and the load at 70 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
32. 32.⚖️ A seesaw balances. Asha (200 N) sits ? m from the pivot on one side; Zoya (200 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
33. 33.Which of these is a lever? (a) a door stopper (b) a knife edge (c) a well winch handle (d) a crowbar
34. 34.⚖️ Which class of lever is a beam balance? (a) class 3 (b) class 2 (c) class 1
35. 35.⚖️ A lever bar balances. The load is ? N at 40 cm from the fulcrum. The effort is 320 N at 100 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 10 cm from the fulcrum. The effort is 60 N at 20 cm from the fulcrum on the other side. What is the missing force in newtons?
37. 37.⚖️ Which class of lever is a pair of pliers? (a) class 3 (b) class 2 (c) class 1
38. 38.⚙️ Which simple machine is an axe blade? (a) screw (b) lever (c) inclined plane (d) wedge
39. 39.⚖️ A seesaw balances. Arjun (600 N) sits 2 m from the pivot on one side; Kabir (400 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
40. 40.⚖️ What is the pivot point of a lever called? (a) the effort (b) the fulcrum (c) the axle (d) the load

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