Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 601 · 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) skating on ice (b) oil on a squeaky hinge (c) a wheel on ball bearings (d) a rough doormat
2. 2.🛞 Is friction helpful or a problem here: walking without slipping? (a) a problem (b) helpful
3. 3.True or false: a fixed pulley hangs on the rope loop. (a) False (b) True
4. 4.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 9 N, sandpaper 11 N, ice 2 N, a glass sheet 6 N. How many newtons more were needed on sandpaper than on ice?
5. 5.Which of these is caused by magnetic force? (a) pedalling a cycle (b) a compass needle turns (c) shoes grip the floor (d) a river flows downhill
6. 6.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) on the fulcrum (b) near the fulcrum (c) on the rock (d) far from the fulcrum
7. 7.🛞 Friction acts … (a) only on ice (b) with the motion (c) only upwards (d) against the motion
8. 8.🏋️ A force of 80 N did 320 J of work. How many metres did the object move?
9. 9.💪 Is drawing up a well bucket a push or a pull? (a) a pull (b) a push
10. 10.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) load ÷ effort (d) effort ÷ load
11. 11.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) no, work stays the same (c) yes, always (d) only on Mondays
12. 12.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) a problem (b) helpful
13. 13.🔍 Which is the odd one out? (a) a tyre with deep treads (b) a box pushed on carpet (c) chalk on a gym bar (d) skating on ice
14. 14.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 10 N, ice 1 N, a wooden plank 5 N, a carpet 7 N. How many newtons more were needed on sandpaper than on ice?
15. 15.💪 Is a tug of war a push or a pull? (a) a pull (b) a push
16. 16.True or false: a tug of war is a pull. (a) False (b) True
17. 17.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a glass sheet 7 N, a wooden plank 8 N, a carpet 11 N. Which surface gave the least friction? (a) a carpet (b) ice (c) a glass sheet (d) a wooden plank
18. 18.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) helpful (b) a problem
19. 19.🔍 Which is the odd one out? (a) a box pushed on carpet (b) sand on a slippery path (c) powder on a carrom board (d) chalk on a gym bar
20. 20.🏋️ Pushing a crate 9 m took 3510 J of work. What force was used, in newtons?
21. 21.⚖️ What is the pivot point of a lever called? (a) the axle (b) the load (c) the effort (d) the fulcrum
22. 22.⚙️ Which simple machine is a steering wheel? (a) wheel and axle (b) inclined plane (c) pulley (d) wedge
23. 23.⚖️ A lever bar balances. The load is ? N at 30 cm from the fulcrum. The effort is 180 N at 60 cm from the fulcrum on the other side. What is the missing force in newtons?
24. 24.⚙️ How many simple machines are there in the usual list? (a) 3 (b) 12 (c) 6 (d) 10
25. 25.⚖️ A lever bar balances. The load is ? N at 40 cm from the fulcrum. The effort is 80 N at 90 cm from the fulcrum on the other side. What is the missing force in newtons?
26. 26.🏋️ Pushing a crate 1 m took 120 J of work. What force was used, in newtons?
27. 27.🪝 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?
28. 28.True or false: a movable pulley stays in one place. (a) False (b) True
29. 29.🪝 A wheel and axle is a big wheel fixed to … (a) a sharp wedge (b) a flat ramp (c) a smaller rod (axle) (d) a loose rope
30. 30.💪 Which force is at work: shoes grip the floor? (a) magnetic force (b) muscular force (c) gravity (d) friction
31. 31.🛞 Rubbing your hands fast makes them … (a) wet (b) cold (c) magnetic (d) warm
32. 32.⚖️ A lever bar balances. The load is 120 N at 30 cm from the fulcrum. The effort is ? N at 30 cm from the fulcrum on the other side. What is the missing force in newtons?
33. 33.⚖️ A seesaw balances. Ravi (360 N) sits 2 m from the pivot on one side; Kabir (360 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
34. 34.⚙️ Which simple machine is a truck loading ramp? (a) wheel and axle (b) lever (c) inclined plane (d) wedge
35. 35.Which of these is a wheel and axle? (a) a wood screw (b) a road up a hill (c) a claw hammer on a nail (d) a steering wheel
36. 36.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 3 N, a wooden plank 7 N, a carpet 9 N, ice 1 N. Which surface gave the least friction? (a) a glass sheet (b) a carpet (c) a wooden plank (d) ice
37. 37.🔍 Which is the odd one out? (a) a bottle opener (b) a knife edge (c) a crowbar (d) a seesaw
38. 38.⚖️ Turning effect = force × … (a) colour of bar (b) time taken (c) mass of fulcrum (d) distance from fulcrum
39. 39.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) the same effort (d) less effort
40. 40.True or false: plucking a mango is a pull. (a) True (b) False

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