Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 538 · 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 is the odd one out? (a) a water tap handle (b) a road up a hill (c) a well winch handle (d) a steering wheel
2. 2.True or false: a truck loading ramp is a wedge. (a) False (b) True
3. 3.True or false: a pair of kitchen tongs is a class 3 lever (effort in the middle). (a) True (b) False
4. 4.💪 In a tug of war, one team pulls right with 30 N and the other pulls left with 5 N. What is the size of the net force, in newtons?
5. 5.🛞 Is friction helpful or a problem here: striking a matchstick? (a) a problem (b) helpful
6. 6.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) no, work stays the same (c) yes, by half (d) yes, always
7. 7.True or false: opening a drawer is a push. (a) False (b) True
8. 8.True or false: a claw hammer on a nail is a lever. (a) True (b) False
9. 9.🔍 Which is the odd one out? (a) a playground slide (b) a road up a hill (c) a truck loading ramp (d) a water tap handle
10. 10.💪 Which force is at work: a thrown ball comes down? (a) friction (b) gravity (c) muscular force (d) magnetic force
11. 11.⚖️ Going along a lever from one end to the other, the order is: load, effort, fulcrum. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
12. 12.💪 In a tug of war, one team pulls right with 15 N and the other pulls left with 5 N. What is the size of the net force, in newtons?
13. 13.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
14. 14.⚙️ Most simple machines make work easier by letting us … (a) switch off gravity (b) make new energy (c) use a smaller force (d) stop all friction
15. 15.💪 Two equal forces push on a box from opposite sides. They are … (a) doubled (b) unbalanced (c) balanced (d) gravity
16. 16.💪 A box weighs 210 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
17. 17.🪝 A load of 210 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
18. 18.🏋️ A 6 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
19. 19.⚙️ A screw is really … (a) a bent lever (b) a tiny pulley (c) a kind of wheel (d) a ramp wrapped round
20. 20.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) through a distance (d) only upwards
21. 21.Which of these is a wedge? (a) a crane hook block (b) a seesaw (c) a door stopper (d) a flagpole rope wheel
22. 22.⚖️ A lever bar balances. The load is ? N at 50 cm from the fulcrum. The effort is 50 N at 20 cm from the fulcrum on the other side. What is the missing force in newtons?
23. 23.🛞 More or less friction: oil on a squeaky hinge? (a) more friction (b) less friction
24. 24.True or false: oil on a squeaky hinge gives less friction. (a) False (b) True
25. 25.True or false: pushing a swing is a push. (a) True (b) False
26. 26.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) helpful (b) a problem
27. 27.True or false: sand on a slippery path gives more friction. (a) False (b) True
28. 28.⚖️ A lever bar balances. The load is ? N at 40 cm from the fulcrum. The effort is 80 N at 20 cm from the fulcrum on the other side. What is the missing force in newtons?
29. 29.💪 Is pressing a doorbell a push or a pull? (a) a pull (b) a push
30. 30.⚖️ A seesaw balances. Kabir (170 N) sits 4 m from the pivot on one side; Ravi (? N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
31. 31.⚖️ A seesaw balances. Ravi (? N) sits 2 m from the pivot on one side; Zoya (360 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
32. 32.⚖️ A seesaw balances. Arjun (680 N) sits 4 m from the pivot on one side; Zoya (680 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
33. 33.Which of these is caused by gravity? (a) rubbing hands warms them (b) brakes stop a bicycle (c) a rolling ball slows (d) an apple falls down
34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 5 N, sandpaper 8 N, ice 3 N, a glass sheet 4 N. Which surface gave the most friction? (a) ice (b) a glass sheet (c) sandpaper (d) a carpet
35. 35.🛞 More or less friction: a wet tiled floor? (a) more friction (b) less friction
36. 36.💪 In which unit do we measure force? (a) newton (N) (b) litre (L) (c) metre (m) (d) second (s)
37. 37.Which of these is caused by magnetic force? (a) pedalling a cycle (b) rain falls to the ground (c) shoes grip the floor (d) a magnet picks up pins
38. 38.⚖️ A lever bar balances. The load is 90 N at 40 cm from the fulcrum. The effort is 120 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
39. 39.⚖️ A seesaw balances. Zoya (? N) sits 3 m from the pivot on one side; Arjun (600 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
40. 40.⚖️ A lever bar balances. The load is ? N at 30 cm from the fulcrum. The effort is 30 N at 50 cm from the fulcrum on the other side. What is the missing force in newtons?

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