Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 767 · 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.Which of these is an inclined plane? (a) the tip of a nail (b) a playground slide (c) a door stopper (d) a knife edge
2. 2.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a movable pulley (b) a fixed pulley
3. 3.⚖️ A seesaw balances. Ravi (540 N) sits ? m from the pivot on one side; Zoya (180 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
4. 4.True or false: a pair of tweezers is a class 2 lever (load in the middle). (a) False (b) True
5. 5.🔍 Which is the odd one out? (a) a wheel on ball bearings (b) powder on a carrom board (c) a grippy rubber sole (d) skating on ice
6. 6.⚖️ Going along a lever from one end to the other, the order is: effort, fulcrum, load. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
7. 7.⚖️ A lever bar balances. The load is ? N at 30 cm from the fulcrum. The effort is 210 N at 80 cm from the fulcrum on the other side. What is the missing force in newtons?
8. 8.🔍 Which is the odd one out? (a) a playground slide (b) a bottle cap (c) a road up a hill (d) a wheelchair ramp
9. 9.⚖️ Along a straight bar, measured from the left end, the effort is at 70 cm, the fulcrum at 10 cm and the load at 50 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
10. 10.💪 Is hitting a cricket ball a push or a pull? (a) a push (b) a pull
11. 11.🏋️ Pushing a crate 1 m took 490 J of work. What force was used, in newtons?
12. 12.🪝 A bucket weighing 270 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
13. 13.⚖️ A seesaw balances. Arjun (720 N) sits 3 m from the pivot on one side; Ravi (540 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
14. 14.🔍 Which is the odd one out? (a) a seesaw (b) a crowbar (c) a bottle opener (d) a truck loading ramp
15. 15.True or false: a fixed pulley only changes direction. (a) True (b) False
16. 16.⚖️ Which class of lever is a fishing rod? (a) class 1 (b) class 3 (c) class 2
17. 17.True or false: a crowbar is a lever. (a) True (b) False
18. 18.⚖️ A lever bar balances. The load is ? N at 40 cm from the fulcrum. The effort is 160 N at 80 cm from the fulcrum on the other side. What is the missing force in newtons?
19. 19.⚖️ Which class of lever is a pair of pliers? (a) class 2 (b) class 3 (c) class 1
20. 20.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 14 N, ice 4 N, a glass sheet 7 N, a carpet 10 N. Which surface gave the most friction? (a) a glass sheet (b) a carpet (c) sandpaper (d) ice
21. 21.💪 Is pulling a cart a push or a pull? (a) a push (b) a pull
22. 22.🏋️ A machine lifts a load of 600 N when you push with 120 N. What is its mechanical advantage (MA)?
23. 23.🏋️ A force of 220 N pushes a cart 6 m along the floor. How much work is done, in joules?
24. 24.🪝 A pulley system lifts a 320 N load with an effort of 160 N. What is its mechanical advantage (MA)?
25. 25.🪝 A pulley system lifts a 520 N load with an effort of 260 N. What is its mechanical advantage (MA)?
26. 26.True or false: pushing a swing is a push. (a) False (b) True
27. 27.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 40 cm and the load at 0 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
28. 28.⚖️ In a class 2 lever, what is in the middle? (a) the axle (b) the effort (c) the fulcrum (d) the load
29. 29.True or false: plucking a mango is a push. (a) True (b) False
30. 30.True or false: pressing a doorbell is a push. (a) False (b) True
31. 31.Which of these is caused by friction? (a) lifting a school bag (b) rain falls to the ground (c) pedalling a cycle (d) brakes stop a bicycle
32. 32.True or false: kicking a football is a push. (a) True (b) False
33. 33.🪝 A load of 480 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
34. 34.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) helpful (b) a problem
35. 35.⚙️ A screw is really … (a) a tiny pulley (b) a bent lever (c) a ramp wrapped round (d) a kind of wheel
36. 36.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) a problem (b) helpful
37. 37.True or false: a wood screw is a screw. (a) True (b) False
38. 38.Which of these is a screw? (a) a water tap handle (b) a crane hook block (c) a nut and bolt (d) a road up a hill
39. 39.True or false: a pair of scissors is a class 3 lever (effort in the middle). (a) False (b) True
40. 40.🏋️ Pushing a crate 9 m took 4320 J of work. What force was used, in newtons?

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