Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 746 · 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) more effort (b) the same effort (c) no effort (d) less effort
2. 2.True or false: a seesaw is a class 1 lever (fulcrum in the middle). (a) False (b) True
3. 3.🪝 More rope sections holding a load means … (a) the load floats (b) more effort needed (c) no change (d) less effort needed
4. 4.🪝 A well winch has a handle (wheel) of radius 16 cm turning an axle of radius 2 cm. What is its mechanical advantage (MA)?
5. 5.🏋️ A 15 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
6. 6.💪 Which force is at work: shoes grip the floor? (a) gravity (b) muscular force (c) magnetic force (d) friction
7. 7.⚖️ A seesaw balances. Meena (110 N) sits 3 m from the pivot on one side; Kabir (? N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
8. 8.True or false: a chisel is a lever. (a) False (b) True
9. 9.🏋️ An 11 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
10. 10.True or false: a flagpole rope wheel is a pulley. (a) True (b) False
11. 11.⚖️ A lever bar balances. The load is ? N at 50 cm from the fulcrum. The effort is 150 N at 70 cm from the fulcrum on the other side. What is the missing force in newtons?
12. 12.⚖️ In a class 1 lever, what is in the middle? (a) the effort (b) nothing (c) the fulcrum (d) the load
13. 13.True or false: a rough doormat gives more friction. (a) True (b) False
14. 14.⚖️ A seesaw balances. Arjun (? N) sits 3 m from the pivot on one side; Asha (330 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
15. 15.🛞 Is friction helpful or a problem here: walking without slipping? (a) a problem (b) helpful
16. 16.🪝 A pulley system lifts a 520 N load with an effort of 130 N. What is its mechanical advantage (MA)?
17. 17.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 90 cm and the load at 70 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
18. 18.💪 Is drawing up a well bucket a push or a pull? (a) a push (b) a pull
19. 19.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 5000 N box up it, in newtons? (ideal ramp, no friction)
20. 20.True or false: a box pushed on carpet gives less friction. (a) False (b) True
21. 21.⚖️ A seesaw balances. Asha (? N) sits 2 m from the pivot on one side; Arjun (340 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
22. 22.💪 Is pushing a trolley a push or a pull? (a) a push (b) a pull
23. 23.🏋️ A machine lifts a load of 250 N when you push with 50 N. What is its mechanical advantage (MA)?
24. 24.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 10 N, a glass sheet 2 N, a wooden plank 5 N, a carpet 8 N. How many newtons more were needed on sandpaper than on a glass sheet?
25. 25.🔍 Which is the odd one out? (a) a nutcracker (b) a seesaw (c) a claw hammer on a nail (d) a knife edge
26. 26.💪 Is pulling a cart a push or a pull? (a) a push (b) a pull
27. 27.🔍 Which is the odd one out? (a) a truck loading ramp (b) a playground slide (c) a road up a hill (d) a claw hammer on a nail
28. 28.🪝 A pulley system lifts a 690 N load with an effort of 230 N. What is its mechanical advantage (MA)?
29. 29.⚖️ A seesaw balances. Asha (600 N) sits 1 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.🛞 Is friction helpful or a problem here: machine parts heating up? (a) a problem (b) helpful
31. 31.⚖️ What is the pivot point of a lever called? (a) the axle (b) the load (c) the fulcrum (d) the effort
32. 32.🪝 A winch has a wheel of radius 5 cm and an axle of radius 1 cm. What effort on the wheel lifts a 350 N bucket on the axle, in newtons? (ideal)
33. 33.⚙️ Which simple machine is a water tap handle? (a) inclined plane (b) wheel and axle (c) lever (d) pulley
34. 34.🏋️ A machine lifts a load of 180 N when you push with 30 N. What is its mechanical advantage (MA)?
35. 35.⚙️ A screw is really … (a) a bent lever (b) a tiny pulley (c) a kind of wheel (d) a ramp wrapped round
36. 36.💪 Which force pulls everything towards the Earth? (a) gravity (b) magnetism (c) wind (d) friction
37. 37.🪝 A well winch has a handle (wheel) of radius 4 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
38. 38.⚖️ A seesaw balances. Meena (380 N) sits ? m from the pivot on one side; Arjun (190 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?
39. 39.💪 A force is a … (a) unit of time (b) push or a pull (c) type of sound (d) kind of colour
40. 40.🪝 Fixed or movable pulley: which one rises with the load? (a) a movable pulley (b) a fixed pulley

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