Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 596 · 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 load of 120 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
2. 2.⚖️ In a class 3 lever, what is in the middle? (a) the effort (b) the load (c) the fulcrum (d) the pulley
3. 3.True or false: plucking a mango is a pull. (a) True (b) False
4. 4.True or false: a wheelchair ramp is a lever. (a) False (b) True
5. 5.⚖️ On a seesaw, a heavier child should sit … (a) farther from the pivot (b) on the pivot (c) anywhere (d) closer to the pivot
6. 6.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a fixed pulley (b) a movable pulley
7. 7.🔍 Which is the odd one out? (a) an axe blade (b) the tip of a nail (c) a chisel (d) a claw hammer on a nail
8. 8.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
9. 9.💪 A cart is pulled to the right with 30 N and to the left with 20 N. Which way does the net force act? (a) no net force (b) to the left (c) to the right
10. 10.🪝 Fixed or movable pulley: which one rises with the load? (a) a fixed pulley (b) a movable pulley
11. 11.⚖️ A seesaw balances. Zoya (? N) sits 3 m from the pivot on one side; Ravi (480 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
12. 12.🛞 Which surface gives the MOST friction to a sliding block? (a) glass (b) ice (c) polished marble (d) sandpaper
13. 13.Which of these is caused by muscular force? (a) a thrown ball comes down (b) a compass needle turns (c) rain falls to the ground (d) squeezing a lemon
14. 14.🔍 Which is the odd one out? (a) a tyre with deep treads (b) a grippy rubber sole (c) a wet tiled floor (d) a rough doormat
15. 15.🏋️ Pushing a crate 1 m took 470 J of work. What force was used, in newtons?
16. 16.⚖️ A lever bar balances. The load is 160 N at 20 cm from the fulcrum. The effort is ? N at 80 cm from the fulcrum on the other side. What is the missing force in newtons?
17. 17.Which of these is a pulley? (a) a well-bucket rope wheel (b) a seesaw (c) the tip of a nail (d) a screw jack
18. 18.💪 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) to the left (b) to the right (c) no net force
19. 19.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 10 N, a glass sheet 3 N, a wooden plank 7 N, a carpet 9 N. Which surface gave the most friction? (a) a glass sheet (b) sandpaper (c) a wooden plank (d) a carpet
20. 20.🔍 Which is the odd one out? (a) the tip of a nail (b) a road up a hill (c) an axe blade (d) a knife edge
21. 21.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 50 cm and the load at 30 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
22. 22.True or false: opening a drawer is a push. (a) True (b) False
23. 23.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
24. 24.True or false: a tug of war is a pull. (a) True (b) False
25. 25.🔍 Which is the odd one out? (a) a well-bucket rope wheel (b) a crane hook block (c) a well winch handle (d) a flagpole rope wheel
26. 26.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) a problem (b) helpful
27. 27.True or false: pulling up your socks is a push. (a) True (b) False
28. 28.🏋️ A force of 80 N did 80 J of work. How many metres did the object move?
29. 29.⚙️ How many simple machines are there in the usual list? (a) 12 (b) 10 (c) 6 (d) 3
30. 30.🏋️ A machine lifts a load of 150 N when you push with 30 N. What is its mechanical advantage (MA)?
31. 31.True or false: a wheelbarrow is a class 2 lever (load in the middle). (a) False (b) True
32. 32.⚖️ Which class of lever is a bottle opener? (a) class 2 (b) class 3 (c) class 1
33. 33.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) skating on ice (c) a wheel on ball bearings (d) a rough doormat
34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 10 N, ice 4 N, a wooden plank 7 N, a carpet 8 N. Which surface gave the most friction? (a) a carpet (b) sandpaper (c) a wooden plank (d) ice
35. 35.🪝 Fixed or movable pulley: which one stays in one place? (a) a movable pulley (b) a fixed pulley
36. 36.🏋️ A machine lifts a load of 50 N when you push with 10 N. What is its mechanical advantage (MA)?
37. 37.True or false: opening a drawer is a pull. (a) False (b) True
38. 38.💪 Which force pulls everything towards the Earth? (a) magnetism (b) friction (c) gravity (d) wind
39. 39.True or false: a movable pulley hangs on the rope loop. (a) True (b) False
40. 40.⚖️ A lever bar balances. The load is 490 N at 40 cm from the fulcrum. The effort is 280 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?

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