Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 998 · 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.True or false: a movable pulley stays in one place. (a) True (b) False
2. 2.⚖️ A seesaw balances. Ravi (420 N) sits 3 m from the pivot on one side; Asha (? N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
3. 3.🛞 Rubbing your hands fast makes them … (a) magnetic (b) wet (c) cold (d) warm
4. 4.⚖️ A seesaw balances. Kabir (400 N) sits ? m from the pivot on one side; Ravi (300 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?
5. 5.⚖️ Which class of lever is a bottle opener? (a) class 3 (b) class 1 (c) class 2
6. 6.🪝 A load of 240 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
7. 7.🔍 Which is the odd one out? (a) skating on ice (b) oil on a squeaky hinge (c) a rough doormat (d) a smooth steel slide
8. 8.🏋️ A force of 300 N pushes a cart 2 m along the floor. How much work is done, in joules?
9. 9.🔍 Which is the odd one out? (a) a rough doormat (b) sand on a slippery path (c) a tyre with deep treads (d) a wet tiled floor
10. 10.🪝 A load of 120 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
11. 11.True or false: a lemon squeezer is a class 2 lever (load in the middle). (a) False (b) True
12. 12.Which of these is a wheel and axle? (a) a bottle opener (b) a claw hammer on a nail (c) a road up a hill (d) a round doorknob
13. 13.True or false: a fixed pulley halves the effort. (a) False (b) True
14. 14.⚙️ Which simple machine is a round doorknob? (a) pulley (b) wheel and axle (c) screw (d) wedge
15. 15.⚖️ A lever balances when … (a) the bar is short (b) the fulcrum moves (c) turning effects match (d) both weights are equal
16. 16.🛞 More or less friction: a grippy rubber sole? (a) less friction (b) more friction
17. 17.💪 Which force is at work: a river flows downhill? (a) gravity (b) muscular force (c) magnetic force (d) friction
18. 18.🏋️ A force of 50 N pushes a cart 8 m along the floor. How much work is done, in joules?
19. 19.Which of these is a wedge? (a) a nut and bolt (b) a seesaw (c) a door stopper (d) a steering wheel
20. 20.True or false: a tyre with deep treads gives more friction. (a) False (b) True
21. 21.🏋️ A longer ramp to the same height needs … (a) less effort (b) the same effort (c) no effort (d) more effort
22. 22.💪 Which force is at work: a magnet picks up pins? (a) muscular force (b) gravity (c) magnetic force (d) friction
23. 23.💪 A bag has a mass of 5 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
24. 24.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 10 cm and the load at 30 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
25. 25.True or false: a seesaw is a class 1 lever (fulcrum in the middle). (a) False (b) True
26. 26.⚖️ Turning effect = force × … (a) mass of fulcrum (b) colour of bar (c) time taken (d) distance from fulcrum
27. 27.⚖️ A lever bar balances. The load is ? N at 30 cm from the fulcrum. The effort is 30 N at 30 cm from the fulcrum on the other side. What is the missing force in newtons?
28. 28.Which of these is a wedge? (a) a screw jack (b) a truck loading ramp (c) the tip of a nail (d) a bottle cap
29. 29.⚖️ A seesaw balances. Asha (300 N) sits 4 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?
30. 30.True or false: a movable pulley hangs on the rope loop. (a) True (b) False
31. 31.True or false: closing a drawer is a push. (a) False (b) True
32. 32.⚙️ Which simple machine is a screw jack? (a) inclined plane (b) screw (c) wedge (d) lever
33. 33.True or false: a fixed pulley makes you pull 2× rope. (a) False (b) True
34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a carpet 6 N, sandpaper 9 N, ice 1 N. How many newtons more were needed on sandpaper than on ice?
35. 35.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a glass sheet 8 N, a carpet 10 N, sandpaper 13 N. Which surface gave the least friction? (a) a glass sheet (b) a carpet (c) sandpaper (d) ice
36. 36.⚖️ Which class of lever is a beam balance? (a) class 1 (b) class 2 (c) class 3
37. 37.True or false: kicking a football is a push. (a) True (b) False
38. 38.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a movable pulley (b) a fixed pulley
39. 39.🛞 Why are tyres made with deep treads? (a) to grip the road (b) to save rubber (c) to look nice (d) to go slower
40. 40.⚖️ Along a straight bar, measured from the left end, the effort is at 90 cm, the fulcrum at 60 cm and the load at 30 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2

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