Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 488 · 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 bucket weighing 300 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
2. 2.🪝 Fixed or movable pulley: which one only changes direction? (a) a fixed pulley (b) a movable pulley
3. 3.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
4. 4.🪝 What does a single fixed pulley change? (a) the direction of pull (b) the size of the load (c) gravity (d) the colour of rope
5. 5.⚖️ A lever bar balances. The load is ? N at 20 cm from the fulcrum. The effort is 200 N at 100 cm from the fulcrum on the other side. What is the missing force in newtons?
6. 6.True or false: a movable pulley makes you pull 2× rope. (a) False (b) True
7. 7.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load ÷ effort (c) load × effort (d) effort ÷ load
8. 8.🪝 Fixed or movable pulley: which one stays in one place? (a) a movable pulley (b) a fixed pulley
9. 9.True or false: a wood screw is an inclined plane. (a) False (b) True
10. 10.True or false: a seesaw is a class 2 lever (load in the middle). (a) True (b) False
11. 11.🏋️ A machine lifts a load of 240 N when you push with 40 N. What is its mechanical advantage (MA)?
12. 12.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 9 N, sandpaper 13 N, a glass sheet 1 N, a wooden plank 5 N. Which surface gave the most friction? (a) a glass sheet (b) a wooden plank (c) a carpet (d) sandpaper
13. 13.⚖️ A lever bar balances. The load is 640 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?
14. 14.🔍 Which is the odd one out? (a) a wheelchair ramp (b) a playground slide (c) a road up a hill (d) a well-bucket rope wheel
15. 15.⚙️ Which simple machine is a flagpole rope wheel? (a) pulley (b) wheel and axle (c) wedge (d) screw
16. 16.🏋️ A force of 210 N did 210 J of work. How many metres did the object move?
17. 17.True or false: pressing a doorbell is a pull. (a) True (b) False
18. 18.💪 In a tug of war, one team pulls right with 65 N and the other pulls left with 15 N. What is the size of the net force, in newtons?
19. 19.True or false: a pair of pliers is a class 2 lever (load in the middle). (a) False (b) True
20. 20.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) metre (m) (d) joule (J)
21. 21.🔍 Which is the odd one out? (a) a seesaw (b) a bottle opener (c) a crowbar (d) a nut and bolt
22. 22.⚖️ On a seesaw, a heavier child should sit … (a) on the pivot (b) farther from the pivot (c) closer to the pivot (d) anywhere
23. 23.🛞 More or less friction: a rough doormat? (a) less friction (b) more friction
24. 24.🔍 Which is the odd one out? (a) a box pushed on carpet (b) a rough doormat (c) sand on a slippery path (d) powder on a carrom board
25. 25.⚖️ A lever balances when … (a) turning effects match (b) the fulcrum moves (c) both weights are equal (d) the bar is short
26. 26.⚖️ A seesaw balances. Zoya (440 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?
27. 27.⚙️ Which simple machine is the tip of a nail? (a) wheel and axle (b) screw (c) pulley (d) wedge
28. 28.True or false: a fixed pulley makes you pull 2× rope. (a) True (b) False
29. 29.🏋️ Pushing a crate 5 m took 700 J of work. What force was used, in newtons?
30. 30.⚖️ A lever bar balances. The load is 40 N at ? cm from the fulcrum. The effort is 80 N at 20 cm from the fulcrum on the other side. What is the missing distance in centimetres?
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a wooden plank 2 N, a carpet 3 N, sandpaper 6 N. How many newtons more were needed on sandpaper than on ice?
32. 32.⚖️ What is the pivot point of a lever called? (a) the axle (b) the effort (c) the fulcrum (d) the load
33. 33.Which of these is caused by friction? (a) brakes stop a bicycle (b) lifting a school bag (c) a magnet picks up pins (d) a river flows downhill
34. 34.🛞 More or less friction: oil on a squeaky hinge? (a) more friction (b) less friction
35. 35.⚖️ Which class of lever is a broom when sweeping? (a) class 2 (b) class 3 (c) class 1
36. 36.🔍 Which is the odd one out? (a) a water tap handle (b) a truck loading ramp (c) a road up a hill (d) a playground slide
37. 37.💪 A force is a … (a) unit of time (b) type of sound (c) push or a pull (d) kind of colour
38. 38.True or false: drawing up a well bucket is a push. (a) True (b) False
39. 39.💪 Which force pulls everything towards the Earth? (a) wind (b) magnetism (c) friction (d) gravity
40. 40.🏋️ Pushing a crate 1 m took 250 J of work. What force was used, in newtons?

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