Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 272 · 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) a crowbar (b) a wheelchair ramp (c) a bottle opener (d) a seesaw
2. 2.🏋️ Pushing a crate 2 m took 540 J of work. What force was used, in newtons?
3. 3.⚖️ A seesaw balances. Zoya (? N) sits 1 m from the pivot on one side; Ravi (140 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
4. 4.🪝 Fixed or movable pulley: which one needs effort = load? (a) a fixed pulley (b) a movable pulley
5. 5.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a fixed pulley (b) a movable pulley
6. 6.⚙️ Most simple machines make work easier by letting us … (a) make new energy (b) switch off gravity (c) stop all friction (d) use a smaller force
7. 7.💪 Which can a force NOT do? (a) start it moving (b) change its shape (c) stop it moving (d) change its colour
8. 8.⚖️ A lever balances when … (a) the fulcrum moves (b) turning effects match (c) the bar is short (d) both weights are equal
9. 9.True or false: a fixed pulley only changes direction. (a) True (b) False
10. 10.🪝 A pulley system lifts a 900 N load with an effort of 300 N. What is its mechanical advantage (MA)?
11. 11.⚖️ In a class 3 lever, what is in the middle? (a) the fulcrum (b) the pulley (c) the effort (d) the load
12. 12.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) load ÷ effort (d) effort ÷ load
13. 13.💪 A box weighs 390 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
14. 14.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) metre (m) (d) joule (J)
15. 15.🪝 A load of 680 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
16. 16.🛞 Which surface gives the MOST friction to a sliding block? (a) glass (b) sandpaper (c) ice (d) polished marble
17. 17.💪 Two children push a box to the right, one with 85 N and the other with 15 N. What is the net (total) force on the box, in newtons?
18. 18.True or false: oil on a squeaky hinge gives more friction. (a) False (b) True
19. 19.🪝 What does a single fixed pulley change? (a) the size of the load (b) the direction of pull (c) the colour of rope (d) gravity
20. 20.True or false: a pair of pliers is a class 1 lever (fulcrum in the middle). (a) True (b) False
21. 21.⚙️ Which simple machine is a claw hammer on a nail? (a) inclined plane (b) wheel and axle (c) pulley (d) lever
22. 22.Which of these is a wedge? (a) a bottle opener (b) an axe blade (c) a nut and bolt (d) a road up a hill
23. 23.True or false: a grippy rubber sole gives less friction. (a) False (b) True
24. 24.🏋️ A machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?
25. 25.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 90 cm and the load at 70 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
26. 26.💪 Is drawing up a well bucket a push or a pull? (a) a push (b) a pull
27. 27.💪 A cart is pulled to the right with 30 N and to the left with 45 N. Which way does the net force act? (a) to the left (b) to the right (c) no net force
28. 28.🔍 Which is the odd one out? (a) a bottle opener (b) a seesaw (c) a bottle cap (d) a crowbar
29. 29.💪 A box weighs 460 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
30. 30.⚖️ On a seesaw, a heavier child should sit … (a) anywhere (b) farther from the pivot (c) closer to the pivot (d) on the pivot
31. 31.💪 A cart is pulled to the right with 35 N and to the left with 20 N. Which way does the net force act? (a) to the left (b) to the right (c) no net force
32. 32.⚙️ Which simple machine is a well-bucket rope wheel? (a) wedge (b) wheel and axle (c) inclined plane (d) pulley
33. 33.⚙️ Which simple machine is a nut and bolt? (a) inclined plane (b) pulley (c) wheel and axle (d) screw
34. 34.🪝 Fixed or movable pulley: which one rises with the load? (a) a movable pulley (b) a fixed pulley
35. 35.Which of these is a lever? (a) a truck loading ramp (b) a well-bucket rope wheel (c) a door stopper (d) a crowbar
36. 36.🪝 A load of 460 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
37. 37.True or false: opening a drawer is a pull. (a) False (b) True
38. 38.🔍 Which is the odd one out? (a) an axe blade (b) a door stopper (c) a crowbar (d) a chisel
39. 39.🏋️ A machine lifts a load of 270 N when you push with 90 N. What is its mechanical advantage (MA)?
40. 40.⚙️ Which simple machine is a knife edge? (a) pulley (b) inclined plane (c) wedge (d) screw

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