Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 764 · 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.⚖️ Going along a lever from one end to the other, the order is: load, fulcrum, effort. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
2. 2.💪 Is kicking a football a push or a pull? (a) a pull (b) a push
3. 3.🪝 Fixed or movable pulley: which one stays in one place? (a) a movable pulley (b) a fixed pulley
4. 4.💪 A bag has a mass of 8 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
5. 5.🛞 Which surface gives the MOST friction to a sliding block? (a) polished marble (b) glass (c) sandpaper (d) ice
6. 6.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, a carpet 8 N, sandpaper 9 N, a glass sheet 2 N. Which surface gave the most friction? (a) sandpaper (b) a wooden plank (c) a carpet (d) a glass sheet
7. 7.🔍 Which is the odd one out? (a) a well-bucket rope wheel (b) a window blind cord (c) a crane hook block (d) a chisel
8. 8.⚖️ A seesaw balances. Meena (100 N) sits 2 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?
9. 9.🛞 Is friction helpful or a problem here: striking a matchstick? (a) a problem (b) helpful
10. 10.⚖️ A seesaw balances. Asha (130 N) sits ? m from the pivot on one side; Arjun (390 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
11. 11.🪝 A bucket weighing 50 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
12. 12.⚖️ A seesaw balances. Arjun (480 N) sits ? m from the pivot on one side; Zoya (360 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?
13. 13.🔍 Which is the odd one out? (a) sand on a slippery path (b) powder on a carrom board (c) a grippy rubber sole (d) chalk on a gym bar
14. 14.⚖️ A seesaw balances. Kabir (110 N) sits 1 m from the pivot on one side; Zoya (110 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
15. 15.Which of these is an inclined plane? (a) a playground slide (b) a jar lid (c) a seesaw (d) a round doorknob
16. 16.🛞 Is friction helpful or a problem here: walking without slipping? (a) helpful (b) a problem
17. 17.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 50 N at 50 cm from the fulcrum on the other side. What is the missing force in newtons?
18. 18.🪝 A load of 260 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
19. 19.🛞 Friction acts … (a) only on ice (b) against the motion (c) with the motion (d) only upwards
20. 20.🔍 Which is the odd one out? (a) a crane hook block (b) a wood screw (c) a window blind cord (d) a well-bucket rope wheel
21. 21.⚖️ In a class 2 lever, what is in the middle? (a) the fulcrum (b) the effort (c) the axle (d) the load
22. 22.🏋️ Pushing a crate 4 m took 1280 J of work. What force was used, in newtons?
23. 23.Which of these is a wedge? (a) a well winch handle (b) a bottle opener (c) a truck loading ramp (d) a chisel
24. 24.🏋️ A 17 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
25. 25.True or false: a tyre with deep treads gives more friction. (a) True (b) False
26. 26.🪝 A pulley system lifts a 240 N load with an effort of 120 N. What is its mechanical advantage (MA)?
27. 27.⚖️ Along a straight bar, measured from the left end, the effort is at 40 cm, the fulcrum at 30 cm and the load at 50 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
28. 28.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a fixed pulley (b) a movable pulley
29. 29.🪝 What does a single fixed pulley change? (a) the size of the load (b) gravity (c) the direction of pull (d) the colour of rope
30. 30.🏋️ A 13 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
31. 31.⚙️ Which simple machine is a round doorknob? (a) screw (b) pulley (c) lever (d) wheel and axle
32. 32.💪 Which force is at work: a magnet picks up pins? (a) friction (b) magnetic force (c) gravity (d) muscular force
33. 33.⚙️ How many simple machines are there in the usual list? (a) 12 (b) 3 (c) 6 (d) 10
34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 4 N, a carpet 6 N, sandpaper 8 N, a glass sheet 2 N. How many newtons more were needed on sandpaper than on a glass sheet?
35. 35.Which of these is a wheel and axle? (a) a well winch handle (b) a screw jack (c) a well-bucket rope wheel (d) a wheelchair ramp
36. 36.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a carpet 7 N, sandpaper 9 N, ice 4 N. How many newtons more were needed on sandpaper than on ice?
37. 37.🪝 A pulley system lifts a 400 N load with an effort of 200 N. What is its mechanical advantage (MA)?
38. 38.⚖️ On a seesaw, a heavier child should sit … (a) closer to the pivot (b) farther from the pivot (c) on the pivot (d) anywhere
39. 39.⚙️ A screw is really … (a) a bent lever (b) a tiny pulley (c) a kind of wheel (d) a ramp wrapped round
40. 40.🪝 A well winch has a handle (wheel) of radius 10 cm turning an axle of radius 5 cm. What is its mechanical advantage (MA)?

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