Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 769 · 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 a wheel and axle? (a) a bottle cap (b) a round doorknob (c) a window blind cord (d) a bottle opener
2. 2.⚖️ A seesaw balances. Zoya (? N) sits 2 m from the pivot on one side; Kabir (320 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
3. 3.⚙️ How many simple machines are there in the usual list? (a) 3 (b) 6 (c) 10 (d) 12
4. 4.🏋️ A force of 500 N did 1500 J of work. How many metres did the object move?
5. 5.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 4 N, a carpet 6 N, sandpaper 8 N. Which surface gave the most friction? (a) ice (b) a glass sheet (c) a carpet (d) sandpaper
6. 6.💪 A cart is pulled to the right with 65 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
7. 7.🛞 Friction acts … (a) with the motion (b) only upwards (c) only on ice (d) against the motion
8. 8.True or false: closing a drawer is a pull. (a) True (b) False
9. 9.True or false: a fixed pulley only changes direction. (a) True (b) False
10. 10.⚖️ Which class of lever is a pair of scissors? (a) class 1 (b) class 3 (c) class 2
11. 11.💪 Is kicking a football a push or a pull? (a) a pull (b) a push
12. 12.💪 Is pressing a doorbell a push or a pull? (a) a push (b) a pull
13. 13.💪 Two children push a box to the right, one with 55 N and the other with 60 N. What is the net (total) force on the box, in newtons?
14. 14.⚖️ A seesaw balances. Asha (640 N) sits ? m from the pivot on one side; Meena (160 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?
15. 15.🪝 A bucket weighing 410 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
16. 16.🪝 A pulley system lifts a 960 N load with an effort of 240 N. What is its mechanical advantage (MA)?
17. 17.🔍 Which is the odd one out? (a) skating on ice (b) a grippy rubber sole (c) a smooth steel slide (d) a wheel on ball bearings
18. 18.🔍 Which is the odd one out? (a) a grippy rubber sole (b) a rough doormat (c) skating on ice (d) a box pushed on carpet
19. 19.⚖️ Turning effect = force × … (a) colour of bar (b) distance from fulcrum (c) time taken (d) mass of fulcrum
20. 20.Which of these is caused by magnetic force? (a) rain falls to the ground (b) pedalling a cycle (c) a magnet picks up pins (d) rubbing hands warms them
21. 21.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) helpful (b) a problem
22. 22.Which of these is a pulley? (a) a nutcracker (b) a jar lid (c) a wood screw (d) a flagpole rope wheel
23. 23.🛞 Why are tyres made with deep treads? (a) to look nice (b) to grip the road (c) to save rubber (d) to go slower
24. 24.Which of these is an inclined plane? (a) a seesaw (b) the tip of a nail (c) a road up a hill (d) a crane hook block
25. 25.🪝 A load of 570 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
26. 26.True or false: a flagpole rope wheel is a pulley. (a) False (b) True
27. 27.💪 Is closing a drawer a push or a pull? (a) a push (b) a pull
28. 28.True or false: a door stopper is a lever. (a) False (b) True
29. 29.⚙️ A screw is really … (a) a bent lever (b) a tiny pulley (c) a ramp wrapped round (d) a kind of wheel
30. 30.⚖️ A seesaw balances. Asha (? N) sits 4 m from the pivot on one side; Arjun (600 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
31. 31.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) a problem (b) helpful
32. 32.💪 A bag has a mass of 7 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
33. 33.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a wooden plank 7 N, a carpet 8 N, ice 4 N. Which surface gave the least friction? (a) ice (b) a carpet (c) a wooden plank (d) a glass sheet
34. 34.🛞 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 9 N, ice 2 N. Which surface gave the most friction? (a) ice (b) a wooden plank (c) a carpet (d) sandpaper
35. 35.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
36. 36.🪝 A pulley system lifts a 340 N load with an effort of 170 N. What is its mechanical advantage (MA)?
37. 37.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, sandpaper 7 N, ice 2 N, a glass sheet 5 N. Which surface gave the most friction? (a) ice (b) a glass sheet (c) sandpaper (d) a wooden plank
38. 38.🔍 Which is the odd one out? (a) a rough doormat (b) sand on a slippery path (c) a wet tiled floor (d) a box pushed on carpet
39. 39.Which of these is an inclined plane? (a) a playground slide (b) a well-bucket rope wheel (c) a crane hook block (d) a wood screw
40. 40.⚖️ In a class 3 lever, what is in the middle? (a) the pulley (b) the fulcrum (c) the load (d) the effort

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