Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 347 · 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.💪 Is pushing a trolley a push or a pull? (a) a push (b) a pull
2. 2.⚙️ Which simple machine is a water tap handle? (a) lever (b) inclined plane (c) pulley (d) wheel and axle
3. 3.🔍 Which is the odd one out? (a) a crowbar (b) a water tap handle (c) a seesaw (d) a nutcracker
4. 4.💪 Is pressing a doorbell a push or a pull? (a) a pull (b) a push
5. 5.⚖️ What is the pivot point of a lever called? (a) the axle (b) the fulcrum (c) the effort (d) the load
6. 6.🛞 Friction acts … (a) with the motion (b) only upwards (c) only on ice (d) against the motion
7. 7.True or false: a fixed pulley only changes direction. (a) True (b) False
8. 8.💪 A bag has a mass of 38 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
9. 9.🛞 Is friction helpful or a problem here: machine parts heating up? (a) helpful (b) a problem
10. 10.🛞 How can we reduce friction in a machine? (a) press parts harder (b) make parts rough (c) add sand (d) oil the moving parts
11. 11.💪 Is hitting a cricket ball a push or a pull? (a) a pull (b) a push
12. 12.⚖️ A seesaw balances. Asha (? N) sits 3 m from the pivot on one side; Ravi (480 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
13. 13.🏋️ A force of 50 N did 350 J of work. How many metres did the object move?
14. 14.🏋️ A machine lifts a load of 240 N when you push with 60 N. What is its mechanical advantage (MA)?
15. 15.True or false: a fixed pulley needs effort = load. (a) False (b) True
16. 16.⚙️ Which simple machine is a knife edge? (a) pulley (b) inclined plane (c) screw (d) wedge
17. 17.🏋️ A machine lifts a load of 400 N when you push with 100 N. What is its mechanical advantage (MA)?
18. 18.⚖️ A seesaw balances. Kabir (120 N) sits ? m from the pivot on one side; Ravi (120 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
19. 19.⚖️ Which class of lever is a fishing rod? (a) class 1 (b) class 3 (c) class 2
20. 20.⚖️ Turning effect = force × … (a) distance from fulcrum (b) colour of bar (c) mass of fulcrum (d) time taken
21. 21.🪝 A winch has a wheel of radius 12 cm and an axle of radius 4 cm. What effort on the wheel lifts a 210 N bucket on the axle, in newtons? (ideal)
22. 22.💪 Two children push a box to the right, one with 45 N and the other with 65 N. What is the net (total) force on the box, in newtons?
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 9 N, ice 2 N, a glass sheet 5 N, a carpet 8 N. Which surface gave the least friction? (a) a glass sheet (b) sandpaper (c) a carpet (d) ice
24. 24.💪 Which can a force NOT do? (a) start it moving (b) stop it moving (c) change its colour (d) change its shape
25. 25.🏋️ A force of 450 N did 450 J of work. How many metres did the object move?
26. 26.⚖️ A seesaw balances. Arjun (360 N) sits ? m from the pivot on one side; Asha (360 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
27. 27.True or false: a flagpole rope wheel is a lever. (a) False (b) True
28. 28.🛞 More or less friction: a grippy rubber sole? (a) less friction (b) more friction
29. 29.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) very slowly (d) only upwards
30. 30.True or false: a nut and bolt is a lever. (a) True (b) False
31. 31.🔍 Which is the odd one out? (a) a wheel on ball bearings (b) a tyre with deep treads (c) a box pushed on carpet (d) a rough doormat
32. 32.⚖️ A lever bar balances. The load is 450 N at ? cm from the fulcrum. The effort is 180 N at 50 cm from the fulcrum on the other side. What is the missing distance in centimetres?
33. 33.⚙️ Which simple machine is a crane hook block? (a) wedge (b) pulley (c) inclined plane (d) wheel and axle
34. 34.⚖️ Which class of lever is your forearm? (a) class 2 (b) class 3 (c) class 1
35. 35.🪝 A wheel and axle is a big wheel fixed to … (a) a loose rope (b) a smaller rod (axle) (c) a flat ramp (d) a sharp wedge
36. 36.⚙️ Which simple machine is a window blind cord? (a) pulley (b) screw (c) wheel and axle (d) inclined plane
37. 37.🪝 A pulley system lifts a 680 N load with an effort of 170 N. What is its mechanical advantage (MA)?
38. 38.💪 A cart is pulled to the right with 75 N and to the left with 70 N. Which way does the net force act? (a) to the left (b) no net force (c) to the right
39. 39.Which of these is a pulley? (a) a screw jack (b) a flagpole rope wheel (c) a claw hammer on a nail (d) a truck loading ramp
40. 40.🛞 Which surface gives the MOST friction to a sliding block? (a) polished marble (b) ice (c) sandpaper (d) glass

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