Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 999 · 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.🏋️ A force of 310 N did 2790 J of work. How many metres did the object move?
2. 2.True or false: a pair of pliers is a class 3 lever (effort in the middle). (a) False (b) True
3. 3.💪 Which force is at work: a thrown ball comes down? (a) friction (b) magnetic force (c) gravity (d) muscular force
4. 4.Which of these is an inclined plane? (a) a truck loading ramp (b) a nutcracker (c) a well-bucket rope wheel (d) a jar lid
5. 5.🪝 A pulley system lifts a 450 N load with an effort of 150 N. What is its mechanical advantage (MA)?
6. 6.🛞 More or less friction: a tyre with deep treads? (a) less friction (b) more friction
7. 7.⚖️ On a seesaw, a heavier child should sit … (a) anywhere (b) closer to the pivot (c) on the pivot (d) farther from the pivot
8. 8.🔍 Which is the odd one out? (a) an axe blade (b) a chisel (c) a window blind cord (d) a door stopper
9. 9.💪 Is drawing up a well bucket a push or a pull? (a) a pull (b) a push
10. 10.Which of these is caused by muscular force? (a) an apple falls down (b) a river flows downhill (c) rubbing hands warms them (d) lifting a school bag
11. 11.🏋️ Pushing a crate 8 m took 640 J of work. What force was used, in newtons?
12. 12.🔍 Which is the odd one out? (a) a wheelchair ramp (b) a crane hook block (c) a well-bucket rope wheel (d) a flagpole rope wheel
13. 13.🛞 More or less friction: powder on a carrom board? (a) less friction (b) more friction
14. 14.True or false: a movable pulley needs effort = load. (a) True (b) False
15. 15.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
16. 16.💪 Is opening a drawer a push or a pull? (a) a pull (b) a push
17. 17.🏋️ Pushing a crate 8 m took 3200 J of work. What force was used, in newtons?
18. 18.💪 Which force is at work: rain falls to the ground? (a) magnetic force (b) friction (c) gravity (d) muscular force
19. 19.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 3 N, a carpet 6 N, sandpaper 7 N, a glass sheet 2 N. How many newtons more were needed on sandpaper than on a glass sheet?
20. 20.🔍 Which is the odd one out? (a) a jar lid (b) a bottle cap (c) a screw jack (d) a bottle opener
21. 21.True or false: pushing a trolley is a push. (a) True (b) False
22. 22.💪 In a tug of war, one team pulls right with 15 N and the other pulls left with 10 N. What is the size of the net force, in newtons?
23. 23.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 60 N at 30 cm from the fulcrum on the other side. What is the missing force in newtons?
24. 24.⚙️ Which simple machine is a seesaw? (a) wedge (b) inclined plane (c) screw (d) lever
25. 25.True or false: a nutcracker is a lever. (a) False (b) True
26. 26.True or false: kicking a football is a pull. (a) False (b) True
27. 27.⚙️ Which simple machine is a road up a hill? (a) inclined plane (b) wheel and axle (c) lever (d) screw
28. 28.True or false: a fishing rod is a class 2 lever (load in the middle). (a) True (b) False
29. 29.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) only upwards (d) through a distance
30. 30.🛞 More or less friction: oil on a squeaky hinge? (a) less friction (b) more friction
31. 31.⚖️ In a class 2 lever, what is in the middle? (a) the load (b) the axle (c) the effort (d) the fulcrum
32. 32.⚖️ A seesaw balances. Asha (420 N) sits 4 m from the pivot on one side; Kabir (560 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
33. 33.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) less effort (d) no effort
34. 34.🛞 More or less friction: a wet tiled floor? (a) less friction (b) more friction
35. 35.⚖️ A lever bar balances. The load is ? N at 40 cm from the fulcrum. The effort is 160 N at 90 cm from the fulcrum on the other side. What is the missing force in newtons?
36. 36.💪 Which force is at work: a compass needle turns? (a) gravity (b) friction (c) muscular force (d) magnetic force
37. 37.⚖️ A seesaw balances. Ravi (280 N) sits 1 m from the pivot on one side; Asha (? N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
38. 38.⚖️ A seesaw balances. Asha (200 N) sits ? m from the pivot on one side; Meena (100 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?
39. 39.🔍 Which is the odd one out? (a) a box pushed on carpet (b) a wet tiled floor (c) a rough doormat (d) a grippy rubber sole
40. 40.🪝 Fixed or movable pulley: which one halves the effort? (a) a movable pulley (b) a fixed pulley

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