Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 575 · 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.⚖️ Turning effect = force × … (a) mass of fulcrum (b) colour of bar (c) distance from fulcrum (d) time taken
2. 2.🏋️ A 12 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
3. 3.🪝 A pulley system lifts a 360 N load with an effort of 180 N. What is its mechanical advantage (MA)?
4. 4.🪝 A winch has a wheel of radius 4 cm and an axle of radius 1 cm. What effort on the wheel lifts a 560 N bucket on the axle, in newtons? (ideal)
5. 5.⚖️ 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 2 (b) class 3 (c) class 1
6. 6.🔍 Which is the odd one out? (a) a water tap handle (b) a seesaw (c) a steering wheel (d) a well winch handle
7. 7.⚙️ Which simple machine is a truck loading ramp? (a) wedge (b) screw (c) inclined plane (d) lever
8. 8.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) helpful (b) a problem
9. 9.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a fixed pulley (b) a movable pulley
10. 10.⚙️ Which simple machine is a claw hammer on a nail? (a) screw (b) pulley (c) lever (d) wedge
11. 11.Which of these is caused by friction? (a) squeezing a lemon (b) lifting a school bag (c) a fridge magnet sticks (d) a rolling ball slows
12. 12.🛞 Why are tyres made with deep treads? (a) to save rubber (b) to go slower (c) to look nice (d) to grip the road
13. 13.💪 Is a tug of war a push or a pull? (a) a push (b) a pull
14. 14.True or false: a bottle opener is a class 2 lever (load in the middle). (a) True (b) False
15. 15.True or false: a tug of war is a push. (a) False (b) True
16. 16.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 6 N, a wooden plank 7 N, a carpet 9 N, ice 2 N. Which surface gave the most friction? (a) ice (b) a carpet (c) a wooden plank (d) a glass sheet
17. 17.True or false: pushing a trolley is a push. (a) True (b) False
18. 18.True or false: a crowbar is a lever. (a) False (b) True
19. 19.🛞 Rubbing your hands fast makes them … (a) cold (b) magnetic (c) wet (d) warm
20. 20.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) watt hour (d) joule (J)
21. 21.🏋️ A 19 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
22. 22.🪝 A bucket weighing 70 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
23. 23.🏋️ A machine lifts a load of 600 N when you push with 100 N. What is its mechanical advantage (MA)?
24. 24.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) helpful (b) a problem
25. 25.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) helpful (b) a problem
26. 26.🔍 Which is the odd one out? (a) a wheelchair ramp (b) a steering wheel (c) a playground slide (d) a truck loading ramp
27. 27.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) a problem (b) helpful
28. 28.🏋️ Pushing a crate 6 m took 2280 J of work. What force was used, in newtons?
29. 29.🪝 Fixed or movable pulley: which one needs effort = load? (a) a fixed pulley (b) a movable pulley
30. 30.⚖️ A lever bar balances. The load is 30 N at ? cm from the fulcrum. The effort is 10 N at 30 cm from the fulcrum on the other side. What is the missing distance in centimetres?
31. 31.🔍 Which is the odd one out? (a) a crowbar (b) a seesaw (c) a bottle opener (d) a truck loading ramp
32. 32.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 2750 N box up it, in newtons? (ideal ramp, no friction)
33. 33.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 30 cm and the load at 70 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
34. 34.⚖️ A seesaw balances. Arjun (520 N) sits 1 m from the pivot on one side; Asha (130 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
35. 35.🏋️ A machine lifts a load of 240 N when you push with 60 N. What is its mechanical advantage (MA)?
36. 36.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) near the fulcrum (b) on the rock (c) on the fulcrum (d) far from the fulcrum
37. 37.⚖️ Going along a lever from one end to the other, the order is: effort, load, fulcrum. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
38. 38.🪝 A well winch has a handle (wheel) of radius 6 cm turning an axle of radius 2 cm. What is its mechanical advantage (MA)?
39. 39.⚖️ Going along a lever from one end to the other, the order is: load, effort, fulcrum. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
40. 40.🛞 More or less friction: a tyre with deep treads? (a) more friction (b) less friction

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