Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 150 · 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 bottle cap? (a) wedge (b) wheel and axle (c) lever (d) screw
2. 2.🏋️ A 6 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
3. 3.🔍 Which is the odd one out? (a) a flagpole rope wheel (b) a round doorknob (c) a well-bucket rope wheel (d) a window blind cord
4. 4.💪 Is pushing a swing a push or a pull? (a) a pull (b) a push
5. 5.💪 In a tug of war, one team pulls left with 100 N and the other pulls right with 45 N. What is the size of the net force, in newtons?
6. 6.🛞 Is friction helpful or a problem here: tyres wearing down? (a) helpful (b) a problem
7. 7.🔍 Which is the odd one out? (a) powder on a carrom board (b) a grippy rubber sole (c) sand on a slippery path (d) chalk on a gym bar
8. 8.🏋️ A force of 380 N did 3420 J of work. How many metres did the object move?
9. 9.🏋️ A machine lifts a load of 570 N when you push with 190 N. What is its mechanical advantage (MA)?
10. 10.🛞 Rubbing your hands fast makes them … (a) cold (b) warm (c) magnetic (d) wet
11. 11.🪝 A winch has a wheel of radius 6 cm and an axle of radius 2 cm. What effort on the wheel lifts a 240 N bucket on the axle, in newtons? (ideal)
12. 12.🏋️ Pushing a crate 1 m took 160 J of work. What force was used, in newtons?
13. 13.🏋️ Pushing a crate 9 m took 180 J of work. What force was used, in newtons?
14. 14.🏋️ A force of 90 N did 180 J of work. How many metres did the object move?
15. 15.💪 Which can a force NOT do? (a) start it moving (b) stop it moving (c) change its shape (d) change its colour
16. 16.Which of these is a lever? (a) a round doorknob (b) a crane hook block (c) a bottle cap (d) a nutcracker
17. 17.🔍 Which is the odd one out? (a) a water tap handle (b) a well winch handle (c) a wheelchair ramp (d) a steering wheel
18. 18.🔍 Which is the odd one out? (a) a window blind cord (b) a well-bucket rope wheel (c) a bottle cap (d) a crane hook block
19. 19.True or false: a window blind cord is a lever. (a) False (b) True
20. 20.💪 A cart is pulled to the right with 90 N and to the left with 105 N. Which way does the net force act? (a) no net force (b) to the left (c) to the right
21. 21.⚖️ On a seesaw, a heavier child should sit … (a) farther from the pivot (b) closer to the pivot (c) on the pivot (d) anywhere
22. 22.🔍 Which is the odd one out? (a) sand on a slippery path (b) a box pushed on carpet (c) a tyre with deep treads (d) a wheel on ball bearings
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 4 N, a carpet 5 N, sandpaper 6 N, a glass sheet 1 N. Which surface gave the most friction? (a) a glass sheet (b) sandpaper (c) a wooden plank (d) a carpet
24. 24.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load ÷ effort (d) load × effort
25. 25.🪝 A pulley system lifts a 520 N load with an effort of 260 N. What is its mechanical advantage (MA)?
26. 26.True or false: a nutcracker is a class 2 lever (load in the middle). (a) True (b) False
27. 27.💪 A cart is pulled to the right with 75 N and to the left with 80 N. Which way does the net force act? (a) no net force (b) to the right (c) to the left
28. 28.Which of these is caused by friction? (a) pedalling a cycle (b) brakes stop a bicycle (c) a fridge magnet sticks (d) squeezing a lemon
29. 29.💪 A box weighs 230 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
30. 30.⚙️ Which simple machine is a knife edge? (a) pulley (b) inclined plane (c) wedge (d) wheel and axle
31. 31.⚖️ A seesaw balances. Zoya (? N) sits 4 m from the pivot on one side; Kabir (680 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
32. 32.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
33. 33.Which of these is caused by magnetic force? (a) shoes grip the floor (b) an apple falls down (c) a compass needle turns (d) rain falls to the ground
34. 34.⚖️ A seesaw balances. Kabir (? N) sits 3 m from the pivot on one side; Asha (330 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
35. 35.True or false: a crowbar is a class 1 lever (fulcrum in the middle). (a) True (b) False
36. 36.True or false: a lemon squeezer is a class 3 lever (effort in the middle). (a) True (b) False
37. 37.🪝 What does a single fixed pulley change? (a) gravity (b) the colour of rope (c) the direction of pull (d) the size of the load
38. 38.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 90 N at 20 cm from the fulcrum on the other side. What is the missing force in newtons?
39. 39.True or false: a movable pulley only changes direction. (a) True (b) False
40. 40.⚖️ A seesaw balances. Arjun (110 N) sits 2 m from the pivot on one side; Asha (220 N) sits ? m from the pivot on the other side. What is the missing distance in metres?

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