Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 64 · 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 caused by muscular force? (a) lifting a school bag (b) a compass needle turns (c) a magnet picks up pins (d) a rolling ball slows
2. 2.🪝 A load of 600 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
3. 3.🔍 Which is the odd one out? (a) a box pushed on carpet (b) oil on a squeaky hinge (c) a rough doormat (d) a grippy rubber sole
4. 4.⚖️ What is the pivot point of a lever called? (a) the effort (b) the fulcrum (c) the load (d) the axle
5. 5.True or false: a fixed pulley is on a flagpole top. (a) False (b) True
6. 6.🛞 More or less friction: a box pushed on carpet? (a) less friction (b) more friction
7. 7.⚙️ Which simple machine is a playground slide? (a) wheel and axle (b) wedge (c) screw (d) inclined plane
8. 8.⚖️ A seesaw balances. Arjun (540 N) sits ? m from the pivot on one side; Ravi (360 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
9. 9.🛞 How can we reduce friction in a machine? (a) add sand (b) press parts harder (c) make parts rough (d) oil the moving parts
10. 10.Which of these is a wheel and axle? (a) a bottle cap (b) a claw hammer on a nail (c) a water tap handle (d) a chisel
11. 11.⚙️ Which simple machine is a round doorknob? (a) pulley (b) wheel and axle (c) inclined plane (d) wedge
12. 12.⚖️ Which class of lever is a beam balance? (a) class 1 (b) class 2 (c) class 3
13. 13.💪 A cart is pulled to the right with 55 N and to the left with 70 N. Which way does the net force act? (a) to the right (b) no net force (c) to the left
14. 14.⚖️ In a class 1 lever, what is in the middle? (a) nothing (b) the effort (c) the fulcrum (d) the load
15. 15.⚙️ Which simple machine is a road up a hill? (a) lever (b) inclined plane (c) screw (d) wedge
16. 16.⚙️ A wedge is … (a) a wheel on a rod (b) two ramps back to back (c) a bar on a pivot (d) a rope on a wheel
17. 17.True or false: a seesaw is a pulley. (a) True (b) False
18. 18.🛞 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?
19. 19.💪 A bag has a mass of 29 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
20. 20.⚖️ Which class of lever is a lemon squeezer? (a) class 2 (b) class 1 (c) class 3
21. 21.⚖️ A lever bar balances. The load is 400 N at ? cm from the fulcrum. The effort is 120 N at 100 cm from the fulcrum on the other side. What is the missing distance in centimetres?
22. 22.⚖️ A seesaw balances. Ravi (? N) sits 3 m from the pivot on one side; Meena (390 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
23. 23.True or false: plucking a mango is a push. (a) False (b) True
24. 24.True or false: a playground slide is an inclined plane. (a) False (b) True
25. 25.🪝 A winch has a wheel of radius 21 cm and an axle of radius 3 cm. What effort on the wheel lifts a 210 N bucket on the axle, in newtons? (ideal)
26. 26.Which of these is a lever? (a) a round doorknob (b) a seesaw (c) the tip of a nail (d) a chisel
27. 27.🏋️ A force of 160 N did 1600 J of work. How many metres did the object move?
28. 28.True or false: a tyre with deep treads gives less friction. (a) True (b) False
29. 29.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 6 N, a wooden plank 8 N, a carpet 10 N, ice 3 N. Which surface gave the least friction? (a) ice (b) a glass sheet (c) a wooden plank (d) a carpet
30. 30.🪝 More rope sections holding a load means … (a) no change (b) more effort needed (c) the load floats (d) less effort needed
31. 31.⚖️ Along a straight bar, measured from the left end, the effort is at 40 cm, the fulcrum at 20 cm and the load at 70 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
32. 32.⚖️ Which class of lever is a wheelbarrow? (a) class 2 (b) class 3 (c) class 1
33. 33.🪝 A load of 40 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: walking without slipping? (a) a problem (b) helpful
35. 35.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) near the fulcrum (b) far from the fulcrum (c) on the fulcrum (d) on the rock
36. 36.🪝 A load of 560 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
37. 37.💪 Is pressing a doorbell a push or a pull? (a) a pull (b) a push
38. 38.🪝 A winch has a wheel of radius 3 cm and an axle of radius 1 cm. What effort on the wheel lifts a 600 N bucket on the axle, in newtons? (ideal)
39. 39.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 9 N, ice 4 N, a glass sheet 5 N, a wooden plank 6 N. How many newtons more were needed on sandpaper than on ice?
40. 40.⚖️ A lever bar balances. The load is 270 N at 30 cm from the fulcrum. The effort is 90 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?

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