Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 583 · 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.⚖️ What is the pivot point of a lever called? (a) the axle (b) the effort (c) the load (d) the fulcrum
2. 2.True or false: kicking a football is a push. (a) False (b) True
3. 3.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, by half (c) only on Mondays (d) yes, always
4. 4.🏋️ A force of 30 N pushes a cart 4 m along the floor. How much work is done, in joules?
5. 5.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 80 cm and the load at 50 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
6. 6.🪝 A bucket weighing 100 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
7. 7.🔍 Which is the odd one out? (a) a grippy rubber sole (b) a smooth steel slide (c) a rough doormat (d) chalk on a gym bar
8. 8.🛞 Rubbing your hands fast makes them … (a) magnetic (b) cold (c) wet (d) warm
9. 9.🔍 Which is the odd one out? (a) the tip of a nail (b) an axe blade (c) a door stopper (d) a playground slide
10. 10.🪝 Fixed or movable pulley: which one needs effort = load? (a) a movable pulley (b) a fixed pulley
11. 11.🏋️ Pushing a crate 6 m took 1920 J of work. What force was used, in newtons?
12. 12.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) helpful (b) a problem
13. 13.True or false: a tug of war is a pull. (a) False (b) True
14. 14.⚖️ Which class of lever is a bottle opener? (a) class 3 (b) class 1 (c) class 2
15. 15.⚖️ Going along a lever from one end to the other, the order is: effort, fulcrum, load. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
16. 16.💪 Which can a force NOT do? (a) start it moving (b) stop it moving (c) change its colour (d) change its shape
17. 17.🏋️ Pushing a crate 5 m took 2450 J of work. What force was used, in newtons?
18. 18.⚖️ A lever bar balances. The load is ? N at 50 cm from the fulcrum. The effort is 350 N at 90 cm from the fulcrum on the other side. What is the missing force in newtons?
19. 19.⚖️ A lever bar balances. The load is 270 N at ? cm from the fulcrum. The effort is 30 N at 90 cm from the fulcrum on the other side. What is the missing distance in centimetres?
20. 20.True or false: a movable pulley hangs on the rope loop. (a) False (b) True
21. 21.🏋️ A longer ramp to the same height needs … (a) no effort (b) more effort (c) less effort (d) the same effort
22. 22.🔍 Which is the odd one out? (a) skating on ice (b) a wet tiled floor (c) sand on a slippery path (d) a wheel on ball bearings
23. 23.True or false: a pair of kitchen tongs is a class 3 lever (effort in the middle). (a) False (b) True
24. 24.⚖️ A seesaw balances. Ravi (? N) sits 3 m from the pivot on one side; Asha (510 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
25. 25.🛞 More or less friction: a wheel on ball bearings? (a) more friction (b) less friction
26. 26.⚖️ A lever bar balances. The load is 140 N at 40 cm from the fulcrum. The effort is 80 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
27. 27.🔍 Which is the odd one out? (a) a chisel (b) a steering wheel (c) a water tap handle (d) a well winch handle
28. 28.🪝 A well winch has a handle (wheel) of radius 12 cm turning an axle of radius 3 cm. What is its mechanical advantage (MA)?
29. 29.🪝 A bucket weighing 230 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
30. 30.True or false: a rough doormat gives less friction. (a) True (b) False
31. 31.🛞 Which surface gives the MOST friction to a sliding block? (a) ice (b) glass (c) polished marble (d) sandpaper
32. 32.⚖️ A seesaw balances. Ravi (160 N) sits 4 m from the pivot on one side; Zoya (640 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
33. 33.⚖️ Along a straight bar, measured from the left end, the effort is at 40 cm, the fulcrum at 60 cm and the load at 30 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
34. 34.True or false: a wheelbarrow is a class 2 lever (load in the middle). (a) False (b) True
35. 35.True or false: a smooth steel slide gives more friction. (a) True (b) False
36. 36.🏋️ A machine lifts a load of 240 N when you push with 80 N. What is its mechanical advantage (MA)?
37. 37.💪 Is pulling up your socks a push or a pull? (a) a push (b) a pull
38. 38.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
39. 39.💪 A bag has a mass of 7 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
40. 40.True or false: a movable pulley makes you pull 2× rope. (a) True (b) False

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