Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 233 · 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 force of 480 N did 4320 J of work. How many metres did the object move?
2. 2.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) joule (J) (d) metre (m)
3. 3.💪 Which force pulls everything towards the Earth? (a) friction (b) gravity (c) magnetism (d) wind
4. 4.True or false: opening a drawer is a push. (a) True (b) False
5. 5.🪝 A bucket weighing 320 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
6. 6.💪 Is pushing a swing a push or a pull? (a) a push (b) a pull
7. 7.⚖️ A lever bar balances. The load is ? N at 50 cm from the fulcrum. The effort is 100 N at 80 cm from the fulcrum on the other side. What is the missing force in newtons?
8. 8.🪝 A well winch has a handle (wheel) of radius 12 cm turning an axle of radius 4 cm. What is its mechanical advantage (MA)?
9. 9.⚖️ A seesaw balances. Meena (330 N) sits 2 m from the pivot on one side; Ravi (? N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
10. 10.Which of these is an inclined plane? (a) a road up a hill (b) a crane hook block (c) a wood screw (d) a bottle cap
11. 11.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load ÷ effort (c) load × effort (d) effort ÷ load
12. 12.🪝 A winch has a wheel of radius 20 cm and an axle of radius 5 cm. What effort on the wheel lifts a 680 N bucket on the axle, in newtons? (ideal)
13. 13.⚖️ In a class 2 lever, what is in the middle? (a) the effort (b) the axle (c) the load (d) the fulcrum
14. 14.⚖️ A lever bar balances. The load is ? N at 50 cm from the fulcrum. The effort is 200 N at 90 cm from the fulcrum on the other side. What is the missing force in newtons?
15. 15.💪 Which can a force NOT do? (a) stop it moving (b) start it moving (c) change its shape (d) change its colour
16. 16.True or false: sand on a slippery path gives more friction. (a) False (b) True
17. 17.True or false: a fixed pulley makes you pull 2× rope. (a) True (b) False
18. 18.🏋️ A force of 100 N pushes a cart 5 m along the floor. How much work is done, in joules?
19. 19.True or false: a wheel on ball bearings gives less friction. (a) False (b) True
20. 20.⚖️ Turning effect = force × … (a) distance from fulcrum (b) mass of fulcrum (c) time taken (d) colour of bar
21. 21.⚖️ Which class of lever is a pair of tweezers? (a) class 3 (b) class 1 (c) class 2
22. 22.💪 In a tug of war, one team pulls right with 60 N and the other pulls left with 20 N. What is the size of the net force, in newtons?
23. 23.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 100 cm and the load at 70 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
24. 24.🏋️ A 10 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
25. 25.🪝 A bucket weighing 450 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
26. 26.Which of these is caused by muscular force? (a) an apple falls down (b) shoes grip the floor (c) squeezing a lemon (d) a fridge magnet sticks
27. 27.True or false: pulling up your socks is a push. (a) True (b) False
28. 28.⚖️ A seesaw balances. Kabir (280 N) sits 4 m from the pivot on one side; Zoya (560 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
29. 29.🪝 A pulley system has 2 rope sections holding up the load. To lift the load by 2 m, how many metres of rope must you pull?
30. 30.💪 Which force is at work: rubbing hands warms them? (a) gravity (b) muscular force (c) magnetic force (d) friction
31. 31.⚖️ On a seesaw, a heavier child should sit … (a) anywhere (b) on the pivot (c) closer to the pivot (d) farther from the pivot
32. 32.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) through a distance (d) without moving it
33. 33.⚙️ Which simple machine is a truck loading ramp? (a) screw (b) wedge (c) lever (d) inclined plane
34. 34.🪝 A load of 240 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
35. 35.⚖️ Along a straight bar, measured from the left end, the effort is at 60 cm, the fulcrum at 10 cm and the load at 30 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
36. 36.🛞 Is friction helpful or a problem here: striking a matchstick? (a) helpful (b) a problem
37. 37.Which of these is a wedge? (a) a nut and bolt (b) a round doorknob (c) the tip of a nail (d) a claw hammer on a nail
38. 38.🪝 A winch has a wheel of radius 14 cm and an axle of radius 2 cm. What effort on the wheel lifts a 980 N bucket on the axle, in newtons? (ideal)
39. 39.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 8 N, a carpet 9 N, sandpaper 12 N, a glass sheet 4 N. How many newtons more were needed on sandpaper than on a glass sheet?
40. 40.💪 Is pressing a doorbell a push or a pull? (a) a pull (b) a push

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