Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 308 · 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 is the odd one out? (a) a claw hammer on a nail (b) a crowbar (c) a well-bucket rope wheel (d) a bottle opener
2. 2.🔍 Which is the odd one out? (a) powder on a carrom board (b) a wet tiled floor (c) chalk on a gym bar (d) oil on a squeaky hinge
3. 3.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 700 N box up it, in newtons? (ideal ramp, no friction)
4. 4.🛞 Friction acts … (a) only upwards (b) against the motion (c) only on ice (d) with the motion
5. 5.⚖️ Which class of lever is a bottle opener? (a) class 1 (b) class 2 (c) class 3
6. 6.True or false: a crane hook block is an inclined plane. (a) False (b) True
7. 7.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
8. 8.⚙️ Which simple machine is a door stopper? (a) pulley (b) screw (c) lever (d) wedge
9. 9.🪝 A pulley system has 2 rope sections holding up the load. To lift the load by 3 m, how many metres of rope must you pull?
10. 10.⚖️ Which class of lever is a seesaw? (a) class 2 (b) class 3 (c) class 1
11. 11.⚙️ A wedge is … (a) a wheel on a rod (b) a bar on a pivot (c) two ramps back to back (d) a rope on a wheel
12. 12.Which of these is a screw? (a) a wood screw (b) a knife edge (c) a road up a hill (d) a crane hook block
13. 13.⚖️ A seesaw balances. Asha (600 N) sits 3 m from the pivot on one side; Kabir (600 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
14. 14.⚖️ Which class of lever is a crowbar? (a) class 1 (b) class 2 (c) class 3
15. 15.🔍 Which is the odd one out? (a) skating on ice (b) a wet tiled floor (c) a tyre with deep treads (d) powder on a carrom board
16. 16.🪝 A bucket weighing 220 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
17. 17.True or false: a movable pulley needs effort = load. (a) True (b) False
18. 18.💪 Two children push a box to the right, one with 70 N and the other with 25 N. What is the net (total) force on the box, in newtons?
19. 19.⚖️ Which class of lever is a wheelbarrow? (a) class 1 (b) class 3 (c) class 2
20. 20.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 11 N, ice 3 N, a glass sheet 5 N, a carpet 9 N. Which surface gave the least friction? (a) a glass sheet (b) a carpet (c) sandpaper (d) ice
21. 21.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 50 cm and the load at 40 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
22. 22.🏋️ A force of 290 N did 2900 J of work. How many metres did the object move?
23. 23.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 5 m, how many metres of rope must you pull?
24. 24.💪 A bag has a mass of 38 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
25. 25.True or false: pressing a doorbell is a pull. (a) False (b) True
26. 26.True or false: kicking a football is a push. (a) False (b) True
27. 27.⚖️ A lever balances when … (a) both weights are equal (b) the fulcrum moves (c) turning effects match (d) the bar is short
28. 28.🏋️ A machine lifts a load of 660 N when you push with 110 N. What is its mechanical advantage (MA)?
29. 29.⚙️ Which simple machine is a screw jack? (a) screw (b) inclined plane (c) wedge (d) lever
30. 30.True or false: sand on a slippery path gives less friction. (a) False (b) True
31. 31.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) helpful (b) a problem
32. 32.True or false: a rough doormat gives less friction. (a) True (b) False
33. 33.💪 A box weighs 170 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
34. 34.⚖️ A seesaw balances. Asha (560 N) sits 1 m from the pivot on one side; Ravi (140 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
35. 35.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load ÷ effort (c) load × effort (d) load + effort
36. 36.⚖️ A lever bar balances. The load is ? N at 30 cm from the fulcrum. The effort is 180 N at 70 cm from the fulcrum on the other side. What is the missing force in newtons?
37. 37.🔍 Which is the odd one out? (a) a screw jack (b) a steering wheel (c) a bottle cap (d) a wood screw
38. 38.⚙️ How many simple machines are there in the usual list? (a) 12 (b) 3 (c) 6 (d) 10
39. 39.Which of these is caused by gravity? (a) a compass needle turns (b) rubbing hands warms them (c) rain falls to the ground (d) a magnet picks up pins
40. 40.🪝 A pulley system lifts a 720 N load with an effort of 240 N. What is its mechanical advantage (MA)?

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