Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 280 · 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 simple machine is a wood screw? (a) lever (b) screw (c) wheel and axle (d) pulley
2. 2.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 70 cm and the load at 30 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
3. 3.🪝 A pulley system has 2 rope sections holding up the load. To lift the load by 9 m, how many metres of rope must you pull?
4. 4.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 50 cm and the load at 40 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
5. 5.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) no, work stays the same (c) yes, always (d) only on Mondays
6. 6.⚖️ Which class of lever is a seesaw? (a) class 1 (b) class 2 (c) class 3
7. 7.True or false: pushing a swing is a pull. (a) False (b) True
8. 8.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 10 cm and the load at 0 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
9. 9.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
10. 10.True or false: a broom when sweeping is a class 2 lever (load in the middle). (a) True (b) False
11. 11.🔍 Which is the odd one out? (a) a wet tiled floor (b) a grippy rubber sole (c) skating on ice (d) a smooth steel slide
12. 12.🔍 Which is the odd one out? (a) a flagpole rope wheel (b) a window blind cord (c) a water tap handle (d) a well-bucket rope wheel
13. 13.⚙️ Which simple machine is a seesaw? (a) lever (b) screw (c) wheel and axle (d) pulley
14. 14.🪝 A bucket weighing 140 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
15. 15.⚖️ A seesaw balances. Arjun (? N) sits 3 m from the pivot on one side; Zoya (360 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
16. 16.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a movable pulley (b) a fixed pulley
17. 17.Which of these is caused by muscular force? (a) a compass needle turns (b) shoes grip the floor (c) rain falls to the ground (d) lifting a school bag
18. 18.⚖️ A lever balances when … (a) the fulcrum moves (b) both weights are equal (c) the bar is short (d) turning effects match
19. 19.⚙️ Which simple machine is a truck loading ramp? (a) wedge (b) pulley (c) wheel and axle (d) inclined plane
20. 20.Which of these is a wedge? (a) a screw jack (b) a well-bucket rope wheel (c) an axe blade (d) a claw hammer on a nail
21. 21.True or false: a pair of tweezers is a class 2 lever (load in the middle). (a) False (b) True
22. 22.💪 A box weighs 130 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
23. 23.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) on the fulcrum (b) on the rock (c) far from the fulcrum (d) near the fulcrum
24. 24.True or false: a fixed pulley only changes direction. (a) False (b) True
25. 25.🛞 More or less friction: powder on a carrom board? (a) more friction (b) less friction
26. 26.🏋️ A 19 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
27. 27.⚖️ A lever bar balances. The load is ? N at 20 cm from the fulcrum. The effort is 160 N at 90 cm from the fulcrum on the other side. What is the missing force in newtons?
28. 28.⚖️ In a class 3 lever, what is in the middle? (a) the pulley (b) the fulcrum (c) the load (d) the effort
29. 29.💪 In a tug of war, one team pulls right with 50 N and the other pulls left with 20 N. What is the size of the net force, in newtons?
30. 30.💪 A box weighs 380 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
31. 31.⚖️ A seesaw balances. Arjun (150 N) sits ? m from the pivot on one side; Kabir (450 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
32. 32.True or false: a grippy rubber sole gives less friction. (a) True (b) False
33. 33.Which of these is a lever? (a) a screw jack (b) a crane hook block (c) a well winch handle (d) a bottle opener
34. 34.💪 In which unit do we measure force? (a) metre (m) (b) litre (L) (c) second (s) (d) newton (N)
35. 35.True or false: a grippy rubber sole gives more friction. (a) False (b) True
36. 36.💪 Is kicking a football a push or a pull? (a) a pull (b) a push
37. 37.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 10 m, how many metres of rope must you pull?
38. 38.🔍 Which is the odd one out? (a) a wheelchair ramp (b) a road up a hill (c) a playground slide (d) a well-bucket rope wheel
39. 39.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 3 N, a carpet 6 N, sandpaper 9 N, ice 2 N. Which surface gave the most friction? (a) ice (b) sandpaper (c) a carpet (d) a wooden plank
40. 40.⚖️ A seesaw balances. Ravi (680 N) sits 1 m from the pivot on one side; Meena (? N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?

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