Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 718 · 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.💪 Is hitting a cricket ball a push or a pull? (a) a pull (b) a push
2. 2.Which of these is a pulley? (a) a playground slide (b) a seesaw (c) a truck loading ramp (d) a flagpole rope wheel
3. 3.🪝 More rope sections holding a load means … (a) less effort needed (b) the load floats (c) no change (d) more effort needed
4. 4.🏋️ A machine lifts a load of 200 N when you push with 100 N. What is its mechanical advantage (MA)?
5. 5.⚖️ A seesaw balances. Zoya (640 N) sits 1 m from the pivot on one side; Kabir (? N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
6. 6.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 9 N, ice 1 N, a glass sheet 5 N, a carpet 8 N. How many newtons more were needed on sandpaper than on ice?
7. 7.💪 Is closing a drawer a push or a pull? (a) a pull (b) a push
8. 8.🔍 Which is the odd one out? (a) a smooth steel slide (b) a grippy rubber sole (c) oil on a squeaky hinge (d) a wheel on ball bearings
9. 9.True or false: chalk on a gym bar gives more friction. (a) False (b) True
10. 10.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 3 N, a wooden plank 7 N, a carpet 11 N. How many newtons more were needed on a carpet than on ice?
11. 11.⚖️ A lever bar balances. The load is 200 N at 10 cm from the fulcrum. The effort is ? N at 20 cm from the fulcrum on the other side. What is the missing force in newtons?
12. 12.⚖️ Which class of lever is a bottle opener? (a) class 1 (b) class 2 (c) class 3
13. 13.⚙️ Which simple machine is an axe blade? (a) pulley (b) wheel and axle (c) lever (d) wedge
14. 14.🛞 Friction acts … (a) with the motion (b) only on ice (c) against the motion (d) only upwards
15. 15.⚖️ Turning effect = force × … (a) time taken (b) colour of bar (c) mass of fulcrum (d) distance from fulcrum
16. 16.Which of these is caused by gravity? (a) squeezing a lemon (b) a fridge magnet sticks (c) brakes stop a bicycle (d) a river flows downhill
17. 17.💪 Is pushing a swing a push or a pull? (a) a pull (b) a push
18. 18.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load × effort (d) load ÷ effort
19. 19.True or false: a broom when sweeping is a class 3 lever (effort in the middle). (a) True (b) False
20. 20.🔍 Which is the odd one out? (a) a playground slide (b) a wheelchair ramp (c) a truck loading ramp (d) a jar lid
21. 21.⚖️ A lever bar balances. The load is 500 N at 50 cm from the fulcrum. The effort is ? N at 100 cm from the fulcrum on the other side. What is the missing force in newtons?
22. 22.🔍 Which is the odd one out? (a) the tip of a nail (b) a steering wheel (c) a round doorknob (d) a well winch handle
23. 23.🏋️ A longer ramp to the same height needs … (a) no effort (b) less effort (c) the same effort (d) more effort
24. 24.True or false: a fixed pulley rises with the load. (a) True (b) False
25. 25.⚖️ Which class of lever is your forearm? (a) class 1 (b) class 2 (c) class 3
26. 26.🏋️ A force of 10 N did 50 J of work. How many metres did the object move?
27. 27.True or false: a claw hammer on a nail is a wheel and axle. (a) True (b) False
28. 28.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, a carpet 8 N, sandpaper 9 N, ice 3 N. How many newtons more were needed on sandpaper than on ice?
29. 29.Which of these is caused by friction? (a) a thrown ball comes down (b) a compass needle turns (c) pedalling a cycle (d) brakes stop a bicycle
30. 30.⚖️ In a class 3 lever, what is in the middle? (a) the pulley (b) the load (c) the effort (d) the fulcrum
31. 31.💪 Which force is at work: a magnet picks up pins? (a) magnetic force (b) gravity (c) muscular force (d) friction
32. 32.⚖️ A seesaw balances. Meena (? N) sits 3 m from the pivot on one side; Asha (540 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
33. 33.Which of these is caused by magnetic force? (a) a thrown ball comes down (b) squeezing a lemon (c) a fridge magnet sticks (d) an apple falls down
34. 34.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) metre (m) (d) joule (J)
35. 35.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 0 cm and the load at 40 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
36. 36.🏋️ A machine lifts a load of 480 N when you push with 160 N. What is its mechanical advantage (MA)?
37. 37.⚙️ Which simple machine is a round doorknob? (a) wheel and axle (b) inclined plane (c) pulley (d) wedge
38. 38.True or false: pulling a cart is a push. (a) False (b) True
39. 39.True or false: sand on a slippery path gives less friction. (a) True (b) False
40. 40.🔍 Which is the odd one out? (a) a road up a hill (b) a chisel (c) an axe blade (d) a knife edge

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