Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 426 · 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) the tip of a nail (b) an axe blade (c) a knife edge (d) a well-bucket rope wheel
2. 2.⚖️ A lever balances when … (a) turning effects match (b) both weights are equal (c) the bar is short (d) the fulcrum moves
3. 3.⚖️ Going along a lever from one end to the other, the order is: load, fulcrum, effort. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
4. 4.True or false: a fixed pulley hangs on the rope loop. (a) False (b) True
5. 5.⚖️ A seesaw balances. Zoya (280 N) sits 1 m from the pivot on one side; Meena (140 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
6. 6.⚖️ What is the pivot point of a lever called? (a) the load (b) the axle (c) the fulcrum (d) the effort
7. 7.🏋️ Pushing a crate 7 m took 2590 J of work. What force was used, in newtons?
8. 8.🪝 A pulley system lifts an 80 N load with an effort of 20 N. What is its mechanical advantage (MA)?
9. 9.⚖️ A lever bar balances. The load is ? N at 30 cm from the fulcrum. The effort is 60 N at 40 cm from the fulcrum on the other side. What is the missing force in newtons?
10. 10.🏋️ An 18 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
11. 11.🏋️ Pushing a crate 7 m took 3360 J of work. What force was used, in newtons?
12. 12.⚖️ Going along a lever from one end to the other, the order is: effort, fulcrum, load. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
13. 13.🛞 Which surface gives the MOST friction to a sliding block? (a) glass (b) polished marble (c) sandpaper (d) ice
14. 14.True or false: pushing a swing is a push. (a) False (b) True
15. 15.🪝 A pulley system lifts a 220 N load with an effort of 110 N. What is its mechanical advantage (MA)?
16. 16.🏋️ An 8 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
17. 17.🏋️ A force of 190 N did 380 J of work. How many metres did the object move?
18. 18.True or false: a box pushed on carpet gives less friction. (a) True (b) False
19. 19.True or false: a movable pulley needs effort = load. (a) True (b) False
20. 20.Which of these is caused by friction? (a) an apple falls down (b) a river flows downhill (c) rubbing hands warms them (d) squeezing a lemon
21. 21.True or false: pushing a trolley is a pull. (a) False (b) True
22. 22.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a wooden plank 8 N, a carpet 10 N, sandpaper 13 N. Which surface gave the least friction? (a) ice (b) a carpet (c) a wooden plank (d) sandpaper
23. 23.True or false: a broom when sweeping is a class 3 lever (effort in the middle). (a) False (b) True
24. 24.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
25. 25.⚙️ Most simple machines make work easier by letting us … (a) stop all friction (b) switch off gravity (c) make new energy (d) use a smaller force
26. 26.⚖️ A seesaw balances. Asha (800 N) sits 2 m from the pivot on one side; Zoya (? N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
27. 27.🏋️ A force of 340 N did 680 J of work. How many metres did the object move?
28. 28.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
29. 29.Which of these is caused by magnetic force? (a) squeezing a lemon (b) rain falls to the ground (c) rubbing hands warms them (d) a compass needle turns
30. 30.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a movable pulley (b) a fixed pulley
31. 31.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
32. 32.⚖️ Going along a lever from one end to the other, the order is: effort, load, fulcrum. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
33. 33.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) only upwards (d) very slowly
34. 34.💪 A box weighs 270 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
35. 35.⚖️ A seesaw balances. Asha (400 N) sits 3 m from the pivot on one side; Kabir (? N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
36. 36.⚖️ 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 1 (b) class 3 (c) class 2
37. 37.⚖️ Along a straight bar, measured from the left end, the effort is at 40 cm, the fulcrum at 10 cm and the load at 50 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
38. 38.⚙️ A screw is really … (a) a tiny pulley (b) a ramp wrapped round (c) a kind of wheel (d) a bent lever
39. 39.🪝 A well winch has a handle (wheel) of radius 3 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
40. 40.Which of these is caused by magnetic force? (a) brakes stop a bicycle (b) a fridge magnet sticks (c) pedalling a cycle (d) lifting a school bag

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