Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 698 · 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 force is a … (a) unit of time (b) kind of colour (c) type of sound (d) push or a pull
2. 2.🏋️ A 4 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
3. 3.True or false: kicking a football is a push. (a) False (b) True
4. 4.Which of these is an inclined plane? (a) a crane hook block (b) a screw jack (c) a jar lid (d) a wheelchair ramp
5. 5.🔍 Which is the odd one out? (a) a tyre with deep treads (b) chalk on a gym bar (c) skating on ice (d) a box pushed on carpet
6. 6.⚖️ Which class of lever is a seesaw? (a) class 1 (b) class 2 (c) class 3
7. 7.⚖️ A lever bar balances. The load is 30 N at 10 cm from the fulcrum. The effort is 10 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
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 3 (b) class 2 (c) class 1
9. 9.🔍 Which is the odd one out? (a) a bottle opener (b) a door stopper (c) an axe blade (d) the tip of a nail
10. 10.⚖️ A lever balances when … (a) turning effects match (b) both weights are equal (c) the fulcrum moves (d) the bar is short
11. 11.💪 A cart is pulled to the right with 85 N and to the left with 70 N. Which way does the net force act? (a) to the right (b) to the left (c) no net force
12. 12.Which of these is a lever? (a) a well-bucket rope wheel (b) a crane hook block (c) a truck loading ramp (d) a crowbar
13. 13.⚖️ Which class of lever is a crowbar? (a) class 1 (b) class 2 (c) class 3
14. 14.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 60 cm and the load at 50 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
15. 15.True or false: hitting a cricket ball is a pull. (a) True (b) False
16. 16.⚖️ A seesaw balances. Asha (? N) sits 1 m from the pivot on one side; Kabir (150 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
17. 17.🏋️ A 7 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
18. 18.⚖️ A seesaw balances. Arjun (130 N) sits ? m from the pivot on one side; Kabir (260 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
19. 19.🏋️ Work is done when a force moves something … (a) through a distance (b) only upwards (c) without moving it (d) very slowly
20. 20.💪 A cart is pulled to the right with 65 N and to the left with 65 N. Which way does the net force act? (a) to the right (b) to the left (c) no net force
21. 21.⚖️ What is the pivot point of a lever called? (a) the axle (b) the effort (c) the load (d) the fulcrum
22. 22.🏋️ A force of 390 N did 3120 J of work. How many metres did the object move?
23. 23.💪 Two children push a box to the right, one with 100 N and the other with 90 N. What is the net (total) force on the box, in newtons?
24. 24.💪 Is pressing a doorbell a push or a pull? (a) a push (b) a pull
25. 25.⚖️ A seesaw balances. Meena (200 N) sits 3 m from the pivot on one side; Kabir (300 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
26. 26.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 4 N, a carpet 5 N, sandpaper 9 N. How many newtons more were needed on sandpaper than on ice?
27. 27.🏋️ A longer ramp to the same height needs … (a) less effort (b) more effort (c) the same effort (d) no effort
28. 28.🔍 Which is the odd one out? (a) a jar lid (b) a bottle cap (c) a well-bucket rope wheel (d) a nut and bolt
29. 29.True or false: pressing a doorbell is a push. (a) True (b) False
30. 30.True or false: a smooth steel slide gives more friction. (a) True (b) False
31. 31.⚖️ On a seesaw, a heavier child should sit … (a) closer to the pivot (b) farther from the pivot (c) anywhere (d) on the pivot
32. 32.⚙️ A wedge is … (a) a wheel on a rod (b) a rope on a wheel (c) two ramps back to back (d) a bar on a pivot
33. 33.Which of these is a wedge? (a) a water tap handle (b) a chisel (c) a flagpole rope wheel (d) a bottle cap
34. 34.🪝 A bucket weighing 450 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
35. 35.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a glass sheet 4 N, a wooden plank 6 N, a carpet 10 N. Which surface gave the most friction? (a) ice (b) a carpet (c) a glass sheet (d) a wooden plank
36. 36.⚖️ A seesaw balances. Kabir (? N) sits 4 m from the pivot on one side; Asha (560 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
37. 37.Which of these is caused by friction? (a) an apple falls down (b) rubbing hands warms them (c) a magnet picks up pins (d) pedalling a cycle
38. 38.True or false: a box pushed on carpet gives more friction. (a) True (b) False
39. 39.🪝 A load of 560 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
40. 40.🪝 A load of 560 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)

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