Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 845 · 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 chisel? (a) pulley (b) inclined plane (c) wheel and axle (d) wedge
2. 2.Which of these is caused by muscular force? (a) brakes stop a bicycle (b) a magnet picks up pins (c) shoes grip the floor (d) lifting a school bag
3. 3.💪 A cart is pulled to the right with 90 N and to the left with 80 N. Which way does the net force act? (a) no net force (b) to the left (c) to the right
4. 4.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) without moving it (d) very slowly
5. 5.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 90 N at 100 cm from the fulcrum on the other side. What is the missing force in newtons?
6. 6.🔍 Which is the odd one out? (a) a smooth steel slide (b) oil on a squeaky hinge (c) a wheel on ball bearings (d) a rough doormat
7. 7.🪝 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
8. 8.⚖️ Along a straight bar, measured from the left end, the effort is at 90 cm, the fulcrum at 20 cm and the load at 50 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
9. 9.⚙️ A wedge is … (a) two ramps back to back (b) a wheel on a rod (c) a bar on a pivot (d) a rope on a wheel
10. 10.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 11 N, ice 2 N, a glass sheet 6 N, a carpet 9 N. Which surface gave the most friction? (a) ice (b) sandpaper (c) a glass sheet (d) a carpet
11. 11.🔍 Which is the odd one out? (a) a grippy rubber sole (b) chalk on a gym bar (c) sand on a slippery path (d) a wet tiled floor
12. 12.🏋️ Pushing a crate 3 m took 240 J of work. What force was used, in newtons?
13. 13.⚖️ Going along a lever from one end to the other, the order is: load, fulcrum, effort. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
14. 14.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load × effort (d) load ÷ effort
15. 15.💪 Is pulling up your socks a push or a pull? (a) a pull (b) a push
16. 16.⚖️ A seesaw balances. Arjun (400 N) sits ? m from the pivot on one side; Ravi (200 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?
17. 17.True or false: drawing up a well bucket is a push. (a) False (b) True
18. 18.True or false: plucking a mango is a pull. (a) False (b) True
19. 19.⚖️ A lever balances when … (a) turning effects match (b) both weights are equal (c) the fulcrum moves (d) the bar is short
20. 20.⚖️ Which class of lever is a pair of pliers? (a) class 2 (b) class 3 (c) class 1
21. 21.🏋️ Pushing a crate 1 m took 240 J of work. What force was used, in newtons?
22. 22.🪝 Fixed or movable pulley: which one stays in one place? (a) a movable pulley (b) a fixed pulley
23. 23.💪 In a tug of war, one team pulls left with 75 N and the other pulls right with 55 N. What is the size of the net force, in newtons?
24. 24.🪝 A load of 420 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
25. 25.⚖️ In a class 2 lever, what is in the middle? (a) the fulcrum (b) the load (c) the effort (d) the axle
26. 26.🏋️ A force of 420 N pushes a cart 10 m along the floor. How much work is done, in joules?
27. 27.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 50 cm and the load at 60 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
28. 28.🪝 A wheel and axle is a big wheel fixed to … (a) a loose rope (b) a sharp wedge (c) a flat ramp (d) a smaller rod (axle)
29. 29.🏋️ A force of 400 N pushes a cart 3 m along the floor. How much work is done, in joules?
30. 30.🪝 A winch has a wheel of radius 15 cm and an axle of radius 5 cm. What effort on the wheel lifts a 450 N bucket on the axle, in newtons? (ideal)
31. 31.🏋️ A force of 50 N pushes a cart 2 m along the floor. How much work is done, in joules?
32. 32.⚖️ A lever bar balances. The load is 700 N at 40 cm from the fulcrum. The effort is 400 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
33. 33.True or false: a fishing rod is a class 3 lever (effort in the middle). (a) False (b) True
34. 34.⚖️ A seesaw balances. Zoya (? N) sits 2 m from the pivot on one side; Kabir (300 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
35. 35.⚖️ A seesaw balances. Ravi (240 N) sits ? m from the pivot on one side; Asha (360 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?
36. 36.⚖️ In a class 3 lever, what is in the middle? (a) the fulcrum (b) the pulley (c) the load (d) the effort
37. 37.💪 A force is a … (a) type of sound (b) push or a pull (c) kind of colour (d) unit of time
38. 38.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 60 N at 50 cm from the fulcrum on the other side. What is the missing force in newtons?
39. 39.🛞 Which surface gives the MOST friction to a sliding block? (a) glass (b) polished marble (c) ice (d) sandpaper
40. 40.True or false: a flagpole rope wheel is a wheel and axle. (a) False (b) True

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