Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 193 · 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.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) through a distance (d) very slowly
3. 3.🔍 Which is the odd one out? (a) a well winch handle (b) a wheelchair ramp (c) a road up a hill (d) a playground slide
4. 4.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a wooden plank 5 N, a carpet 9 N, sandpaper 12 N. Which surface gave the most friction? (a) a carpet (b) a wooden plank (c) sandpaper (d) a glass sheet
5. 5.⚙️ Which simple machine is a screw jack? (a) inclined plane (b) wheel and axle (c) screw (d) lever
6. 6.⚖️ A lever bar balances. The load is 120 N at ? cm from the fulcrum. The effort is 100 N at 60 cm from the fulcrum on the other side. What is the missing distance in centimetres?
7. 7.🪝 A well winch has a handle (wheel) of radius 14 cm turning an axle of radius 2 cm. What is its mechanical advantage (MA)?
8. 8.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 50 cm and the load at 40 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
9. 9.Which of these is caused by gravity? (a) brakes stop a bicycle (b) pedalling a cycle (c) shoes grip the floor (d) an apple falls down
10. 10.True or false: a box pushed on carpet gives less friction. (a) False (b) True
11. 11.🪝 A load of 480 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
12. 12.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 20 cm and the load at 30 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
13. 13.⚖️ Which class of lever is your forearm? (a) class 3 (b) class 1 (c) class 2
14. 14.⚙️ A screw is really … (a) a tiny pulley (b) a bent lever (c) a ramp wrapped round (d) a kind of wheel
15. 15.⚖️ Along a straight bar, measured from the left end, the effort is at 60 cm, the fulcrum at 10 cm and the load at 30 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
16. 16.🪝 A winch has a wheel of radius 20 cm and an axle of radius 4 cm. What effort on the wheel lifts a 150 N bucket on the axle, in newtons? (ideal)
17. 17.⚙️ A wedge is … (a) a wheel on a rod (b) a bar on a pivot (c) two ramps back to back (d) a rope on a wheel
18. 18.⚖️ A seesaw balances. Kabir (? N) sits 3 m from the pivot on one side; Meena (420 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
19. 19.⚙️ Which simple machine is a claw hammer on a nail? (a) pulley (b) wedge (c) inclined plane (d) lever
20. 20.Which of these is caused by gravity? (a) a thrown ball comes down (b) brakes stop a bicycle (c) a rolling ball slows (d) lifting a school bag
21. 21.⚖️ On a seesaw, a heavier child should sit … (a) farther from the pivot (b) on the pivot (c) closer to the pivot (d) anywhere
22. 22.⚖️ A seesaw balances. Meena (390 N) sits 1 m from the pivot on one side; Kabir (? N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
23. 23.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 10 cm and the load at 50 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
24. 24.🔍 Which is the odd one out? (a) a box pushed on carpet (b) a tyre with deep treads (c) powder on a carrom board (d) sand on a slippery path
25. 25.⚖️ A seesaw balances. Meena (340 N) sits 1 m from the pivot on one side; Kabir (170 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
26. 26.🪝 Fixed or movable pulley: which one needs effort = load? (a) a movable pulley (b) a fixed pulley
27. 27.True or false: a tug of war is a pull. (a) False (b) True
28. 28.True or false: a bottle opener is a class 2 lever (load in the middle). (a) False (b) True
29. 29.True or false: hitting a cricket ball is a pull. (a) True (b) False
30. 30.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 80 cm and the load at 20 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
31. 31.🔍 Which is the odd one out? (a) a crane hook block (b) a window blind cord (c) a flagpole rope wheel (d) the tip of a nail
32. 32.⚖️ A seesaw balances. Meena (560 N) sits 2 m from the pivot on one side; Zoya (280 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
33. 33.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
34. 34.🏋️ A force of 400 N did 800 J of work. How many metres did the object move?
35. 35.🏋️ A 12 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
36. 36.🪝 A winch has a wheel of radius 12 cm and an axle of radius 2 cm. What effort on the wheel lifts a 300 N bucket on the axle, in newtons? (ideal)
37. 37.💪 Is kicking a football a push or a pull? (a) a pull (b) a push
38. 38.💪 A cart is pulled to the right with 85 N and to the left with 95 N. Which way does the net force act? (a) no net force (b) to the left (c) to the right
39. 39.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 60 cm and the load at 0 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
40. 40.🔍 Which is the odd one out? (a) a window blind cord (b) a round doorknob (c) a water tap handle (d) a steering wheel

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