Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 953 · 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, effort, fulcrum. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
2. 2.⚖️ A seesaw balances. Ravi (? N) sits 4 m from the pivot on one side; Kabir (560 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
3. 3.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 60 cm and the load at 40 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
4. 4.💪 A cart is pulled to the right with 30 N and to the left with 30 N. Which way does the net force act? (a) to the right (b) to the left (c) no net force
5. 5.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 9 N, ice 3 N, a glass sheet 4 N, a wooden plank 6 N. Which surface gave the most friction? (a) sandpaper (b) a glass sheet (c) a wooden plank (d) ice
6. 6.⚙️ Which simple machine is a well-bucket rope wheel? (a) lever (b) wheel and axle (c) pulley (d) wedge
7. 7.Which of these is caused by friction? (a) a thrown ball comes down (b) pedalling a cycle (c) rubbing hands warms them (d) an apple falls down
8. 8.🏋️ A machine lifts a load of 100 N when you push with 20 N. What is its mechanical advantage (MA)?
9. 9.⚙️ How many simple machines are there in the usual list? (a) 3 (b) 10 (c) 12 (d) 6
10. 10.⚖️ A lever balances when … (a) turning effects match (b) the bar is short (c) both weights are equal (d) the fulcrum moves
11. 11.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) through a distance (d) very slowly
12. 12.🛞 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 7 N, a glass sheet 3 N. Which surface gave the least friction? (a) a wooden plank (b) sandpaper (c) a glass sheet (d) a carpet
13. 13.🛞 More or less friction: skating on ice? (a) less friction (b) more friction
14. 14.⚖️ Which class of lever is a fishing rod? (a) class 3 (b) class 2 (c) class 1
15. 15.🪝 A well winch has a handle (wheel) of radius 5 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
16. 16.🏋️ Pushing a crate 6 m took 2040 J of work. What force was used, in newtons?
17. 17.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a wooden plank 6 N, a carpet 10 N, ice 2 N. How many newtons more were needed on a carpet than on ice?
18. 18.🪝 Fixed or movable pulley: which one only changes direction? (a) a movable pulley (b) a fixed pulley
19. 19.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a wooden plank 6 N, a carpet 10 N, sandpaper 12 N. Which surface gave the most friction? (a) a wooden plank (b) a glass sheet (c) a carpet (d) sandpaper
20. 20.True or false: a fishing rod is a class 2 lever (load in the middle). (a) False (b) True
21. 21.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 0 cm and the load at 10 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
22. 22.True or false: a steering wheel is a wheel and axle. (a) True (b) False
23. 23.⚖️ A seesaw balances. Ravi (320 N) sits 2 m from the pivot on one side; Kabir (? N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
24. 24.True or false: hitting a cricket ball is a push. (a) True (b) False
25. 25.🏋️ Pushing a crate 8 m took 2240 J of work. What force was used, in newtons?
26. 26.🏋️ A 5 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
27. 27.Which of these is a pulley? (a) a crowbar (b) a steering wheel (c) a nutcracker (d) a well-bucket rope wheel
28. 28.Which of these is a wedge? (a) the tip of a nail (b) a water tap handle (c) a road up a hill (d) a crane hook block
29. 29.💪 Is hitting a cricket ball a push or a pull? (a) a pull (b) a push
30. 30.🏋️ A 16 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 force is at work: a magnet picks up pins? (a) muscular force (b) magnetic force (c) gravity (d) friction
32. 32.💪 Is pulling a cart a push or a pull? (a) a push (b) a pull
33. 33.True or false: an axe blade is a wedge. (a) True (b) False
34. 34.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
35. 35.🔍 Which is the odd one out? (a) a crane hook block (b) a window blind cord (c) a well-bucket rope wheel (d) a nut and bolt
36. 36.True or false: a flagpole rope wheel is a wheel and axle. (a) True (b) False
37. 37.🏋️ A force of 490 N did 490 J of work. How many metres did the object move?
38. 38.💪 Two children push a box to the right, one with 100 N and the other with 30 N. What is the net (total) force on the box, in newtons?
39. 39.True or false: a grippy rubber sole gives less friction. (a) True (b) False
40. 40.🔍 Which is the odd one out? (a) sand on a slippery path (b) skating on ice (c) a wet tiled floor (d) a smooth steel slide

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