Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 400 · 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.🪝 More rope sections holding a load means … (a) more effort needed (b) no change (c) the load floats (d) less effort needed
2. 2.True or false: a bottle opener is a class 2 lever (load in the middle). (a) True (b) False
3. 3.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
4. 4.Which of these is a lever? (a) a nutcracker (b) a chisel (c) an axe blade (d) a crane hook block
5. 5.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) helpful (b) a problem
6. 6.🔍 Which is the odd one out? (a) a round doorknob (b) a seesaw (c) a nutcracker (d) a crowbar
7. 7.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) far from the fulcrum (b) on the fulcrum (c) on the rock (d) near the fulcrum
8. 8.💪 Is pulling up your socks a push or a pull? (a) a push (b) a pull
9. 9.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 9 m, how many metres of rope must you pull?
10. 10.🪝 Fixed or movable pulley: which one needs effort = load? (a) a fixed pulley (b) a movable pulley
11. 11.True or false: powder on a carrom board gives less friction. (a) False (b) True
12. 12.True or false: a pair of pliers is a class 3 lever (effort in the middle). (a) False (b) True
13. 13.True or false: a steering wheel is a wheel and axle. (a) True (b) False
14. 14.⚖️ A seesaw balances. Ravi (100 N) sits 1 m from the pivot on one side; Arjun (? N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
15. 15.💪 Is drawing up a well bucket a push or a pull? (a) a push (b) a pull
16. 16.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) yes, always (d) no, work stays the same
17. 17.💪 A bag has a mass of 12 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
18. 18.True or false: pushing a swing is a push. (a) True (b) False
19. 19.💪 A cart is pulled to the right with 100 N and to the left with 100 N. Which way does the net force act? (a) to the right (b) to the left (c) no net force
20. 20.💪 Is pressing a doorbell a push or a pull? (a) a push (b) a pull
21. 21.⚖️ What is the pivot point of a lever called? (a) the fulcrum (b) the axle (c) the load (d) the effort
22. 22.True or false: a grippy rubber sole gives more friction. (a) False (b) True
23. 23.⚖️ A seesaw balances. Kabir (140 N) sits 1 m from the pivot on one side; Ravi (140 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
24. 24.True or false: a rough doormat gives more friction. (a) False (b) True
25. 25.⚖️ A lever balances when … (a) turning effects match (b) both weights are equal (c) the bar is short (d) the fulcrum moves
26. 26.💪 A bag has a mass of 44 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
27. 27.⚖️ A seesaw balances. Arjun (140 N) sits ? m from the pivot on one side; Meena (280 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
28. 28.⚙️ Which simple machine is a knife edge? (a) wedge (b) inclined plane (c) pulley (d) screw
29. 29.⚙️ Which simple machine is a claw hammer on a nail? (a) pulley (b) lever (c) wedge (d) inclined plane
30. 30.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) through a distance (d) without moving it
31. 31.🪝 Fixed or movable pulley: which one only changes direction? (a) a fixed pulley (b) a movable pulley
32. 32.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) no effort (d) less effort
33. 33.⚖️ A lever bar balances. The load is 560 N at 20 cm from the fulcrum. The effort is 140 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
34. 34.⚖️ A lever bar balances. The load is 20 N at ? cm from the fulcrum. The effort is 10 N at 20 cm from the fulcrum on the other side. What is the missing distance in centimetres?
35. 35.True or false: pressing a doorbell is a push. (a) False (b) True
36. 36.💪 Which force pulls everything towards the Earth? (a) magnetism (b) wind (c) gravity (d) friction
37. 37.🔍 Which is the odd one out? (a) a door stopper (b) a bottle opener (c) a crowbar (d) a claw hammer on a nail
38. 38.🏋️ Pushing a crate 8 m took 1840 J of work. What force was used, in newtons?
39. 39.🪝 A load of 520 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.⚖️ In a class 3 lever, what is in the middle? (a) the pulley (b) the load (c) the effort (d) the fulcrum

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