Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 406 · 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 longer ramp to the same height needs … (a) no effort (b) more effort (c) the same effort (d) less effort
2. 2.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) chalk on a gym bar (c) a wheel on ball bearings (d) a smooth steel slide
3. 3.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, a carpet 9 N, ice 3 N, a glass sheet 4 N. Which surface gave the least friction? (a) ice (b) a wooden plank (c) a glass sheet (d) a carpet
4. 4.⚖️ Which class of lever is a crowbar? (a) class 2 (b) class 1 (c) class 3
5. 5.True or false: a pair of pliers is a class 1 lever (fulcrum in the middle). (a) True (b) False
6. 6.🪝 A winch has a wheel of radius 16 cm and an axle of radius 2 cm. What effort on the wheel lifts a 240 N bucket on the axle, in newtons? (ideal)
7. 7.🛞 Why are tyres made with deep treads? (a) to grip the road (b) to save rubber (c) to go slower (d) to look nice
8. 8.🪝 A winch has a wheel of radius 16 cm and an axle of radius 4 cm. What effort on the wheel lifts a 320 N bucket on the axle, in newtons? (ideal)
9. 9.⚖️ A seesaw balances. Arjun (480 N) sits 2 m from the pivot on one side; Asha (? N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
10. 10.💪 Which can a force NOT do? (a) stop it moving (b) start it moving (c) change its shape (d) change its colour
11. 11.🪝 Fixed or movable pulley: which one rises with the load? (a) a fixed pulley (b) a movable pulley
12. 12.⚙️ Most simple machines make work easier by letting us … (a) switch off gravity (b) make new energy (c) stop all friction (d) use a smaller force
13. 13.🪝 A pulley system has 2 rope sections holding up the load. To lift the load by 9 m, how many metres of rope must you pull?
14. 14.⚖️ A lever bar balances. The load is 70 N at 40 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?
15. 15.True or false: a pair of pliers is a class 3 lever (effort in the middle). (a) True (b) False
16. 16.🛞 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 3 N, a wooden plank 7 N. How many newtons more were needed on sandpaper than on ice?
17. 17.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 2 m, how many metres of rope must you pull?
18. 18.True or false: pressing a doorbell is a pull. (a) True (b) False
19. 19.True or false: a wheel on ball bearings gives less friction. (a) True (b) False
20. 20.⚖️ A seesaw balances. Asha (? N) sits 3 m from the pivot on one side; Meena (330 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
21. 21.🛞 More or less friction: chalk on a gym bar? (a) less friction (b) more friction
22. 22.Which of these is caused by gravity? (a) a fridge magnet sticks (b) shoes grip the floor (c) a compass needle turns (d) a river flows downhill
23. 23.⚖️ Turning effect = force × … (a) colour of bar (b) mass of fulcrum (c) time taken (d) distance from fulcrum
24. 24.⚖️ 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 3 (b) class 1 (c) class 2
25. 25.💪 Which force is at work: an apple falls down? (a) friction (b) gravity (c) muscular force (d) magnetic force
26. 26.💪 Is a tug of war a push or a pull? (a) a pull (b) a push
27. 27.🪝 A pulley system has 3 rope sections holding up the load. To lift the load by 1 m, how many metres of rope must you pull?
28. 28.🛞 More or less friction: a rough doormat? (a) more friction (b) less friction
29. 29.True or false: a fishing rod is a class 1 lever (fulcrum in the middle). (a) False (b) True
30. 30.🏋️ Work is done when a force moves something … (a) through a distance (b) very slowly (c) without moving it (d) only upwards
31. 31.🛞 Is friction helpful or a problem here: machine parts heating up? (a) a problem (b) helpful
32. 32.Which of these is a lever? (a) a seesaw (b) a knife edge (c) a window blind cord (d) a road up a hill
33. 33.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, always (c) no, work stays the same (d) yes, by half
34. 34.⚖️ In a class 2 lever, what is in the middle? (a) the load (b) the effort (c) the axle (d) the fulcrum
35. 35.🪝 What does a single fixed pulley change? (a) the size of the load (b) gravity (c) the direction of pull (d) the colour of rope
36. 36.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a fixed pulley (b) a movable pulley
37. 37.True or false: a tug of war is a pull. (a) False (b) True
38. 38.True or false: a smooth steel slide gives less friction. (a) True (b) False
39. 39.💪 Which force is at work: rain falls to the ground? (a) magnetic force (b) friction (c) gravity (d) muscular force
40. 40.⚖️ A lever bar balances. The load is 120 N at 50 cm from the fulcrum. The effort is 200 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?

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