Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 126 · 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.True or false: a fixed pulley only changes direction. (a) True (b) False
2. 2.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a fixed pulley (b) a movable pulley
3. 3.🏋️ A force of 220 N pushes a cart 2 m along the floor. How much work is done, in joules?
4. 4.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 9 N, sandpaper 13 N, ice 1 N, a glass sheet 5 N. How many newtons more were needed on sandpaper than on ice?
5. 5.⚖️ Which class of lever is a wheelbarrow? (a) class 3 (b) class 2 (c) class 1
6. 6.💪 A bag has a mass of 2 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
7. 7.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 6 N, a carpet 8 N, sandpaper 9 N, ice 2 N. Which surface gave the most friction? (a) a glass sheet (b) a carpet (c) ice (d) sandpaper
8. 8.💪 Is pulling a cart a push or a pull? (a) a pull (b) a push
9. 9.⚖️ Along a straight bar, measured from the left end, the effort is at 40 cm, the fulcrum at 0 cm and the load at 10 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
10. 10.🪝 Fixed or movable pulley: which one halves the effort? (a) a fixed pulley (b) a movable pulley
11. 11.🏋️ A machine lifts a load of 440 N when you push with 110 N. What is its mechanical advantage (MA)?
12. 12.True or false: a fixed pulley needs effort = load. (a) True (b) False
13. 13.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
14. 14.🔍 Which is the odd one out? (a) a jar lid (b) a nut and bolt (c) a screw jack (d) a bottle opener
15. 15.🏋️ Pushing a crate 3 m took 1020 J of work. What force was used, in newtons?
16. 16.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) through a distance (d) very slowly
17. 17.🪝 Fixed or movable pulley: which one rises with the load? (a) a fixed pulley (b) a movable pulley
18. 18.⚖️ Turning effect = force × … (a) colour of bar (b) time taken (c) mass of fulcrum (d) distance from fulcrum
19. 19.🪝 A bucket weighing 200 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
20. 20.⚖️ A lever bar balances. The load is 300 N at 20 cm from the fulcrum. The effort is 120 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
21. 21.⚖️ Which class of lever is a pair of scissors? (a) class 2 (b) class 3 (c) class 1
22. 22.🏋️ A 7 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
23. 23.True or false: your forearm is a class 2 lever (load in the middle). (a) True (b) False
24. 24.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load + effort (c) load × effort (d) effort ÷ load
25. 25.⚖️ Which class of lever is a seesaw? (a) class 3 (b) class 2 (c) class 1
26. 26.🏋️ A force of 410 N pushes a cart 2 m along the floor. How much work is done, in joules?
27. 27.🪝 Fixed or movable pulley: which one only changes direction? (a) a movable pulley (b) a fixed pulley
28. 28.🏋️ A force of 310 N pushes a cart 9 m along the floor. How much work is done, in joules?
29. 29.True or false: a movable pulley only changes direction. (a) True (b) False
30. 30.🛞 More or less friction: oil on a squeaky hinge? (a) less friction (b) more friction
31. 31.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 10 m, how many metres of rope must you pull?
32. 32.⚖️ Which class of lever is a lemon squeezer? (a) class 3 (b) class 1 (c) class 2
33. 33.True or false: a movable pulley stays in one place. (a) False (b) True
34. 34.Which of these is caused by friction? (a) a fridge magnet sticks (b) a river flows downhill (c) shoes grip the floor (d) an apple falls down
35. 35.⚖️ A lever bar balances. The load is 100 N at 30 cm from the fulcrum. The effort is ? N at 20 cm from the fulcrum on the other side. What is the missing force in newtons?
36. 36.⚖️ A seesaw balances. Meena (340 N) sits 3 m from the pivot on one side; Kabir (510 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
37. 37.True or false: a broom when sweeping is a class 3 lever (effort in the middle). (a) False (b) True
38. 38.💪 A box weighs 140 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
39. 39.🏋️ A force of 430 N did 430 J of work. How many metres did the object move?
40. 40.⚖️ A seesaw balances. Zoya (? N) sits 1 m from the pivot on one side; Ravi (200 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?

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