Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 573 · 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.⚖️ On a seesaw, a heavier child should sit … (a) closer to the pivot (b) farther from the pivot (c) anywhere (d) on the pivot
2. 2.🪝 What does a single fixed pulley change? (a) the direction of pull (b) the colour of rope (c) the size of the load (d) gravity
3. 3.🪝 Fixed or movable pulley: which one needs effort = load? (a) a movable pulley (b) a fixed pulley
4. 4.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 10 N, ice 1 N, a glass sheet 5 N, a carpet 9 N. Which surface gave the least friction? (a) a carpet (b) sandpaper (c) ice (d) a glass sheet
5. 5.True or false: pulling up your socks is a push. (a) False (b) True
6. 6.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a wooden plank 5 N, a carpet 7 N, sandpaper 11 N. Which surface gave the most friction? (a) ice (b) a wooden plank (c) sandpaper (d) a carpet
7. 7.🏋️ A force of 170 N pushes a cart 6 m along the floor. How much work is done, in joules?
8. 8.⚖️ Which class of lever is a seesaw? (a) class 3 (b) class 2 (c) class 1
9. 9.⚖️ A lever bar balances. The load is ? N at 50 cm from the fulcrum. The effort is 50 N at 100 cm from the fulcrum on the other side. What is the missing force in newtons?
10. 10.Which of these is caused by gravity? (a) lifting a school bag (b) pedalling a cycle (c) an apple falls down (d) a magnet picks up pins
11. 11.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) watt hour (d) joule (J)
12. 12.⚖️ A seesaw balances. Asha (480 N) sits 3 m from the pivot on one side; Kabir (? N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
13. 13.🔍 Which is the odd one out? (a) a bottle cap (b) a screw jack (c) a round doorknob (d) a wood screw
14. 14.True or false: a fixed pulley makes you pull 2× rope. (a) False (b) True
15. 15.⚖️ Going along a lever from one end to the other, the order is: effort, load, fulcrum. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
16. 16.💪 A box weighs 350 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
17. 17.💪 Two children push a box to the right, one with 5 N and the other with 60 N. What is the net (total) force on the box, in newtons?
18. 18.⚖️ A lever bar balances. The load is 500 N at 50 cm from the fulcrum. The effort is 500 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
19. 19.🪝 A well winch has a handle (wheel) of radius 10 cm turning an axle of radius 5 cm. What is its mechanical advantage (MA)?
20. 20.⚖️ A seesaw balances. Asha (120 N) sits 2 m from the pivot on one side; Ravi (? N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
21. 21.⚖️ A lever bar balances. The load is ? N at 20 cm from the fulcrum. The effort is 140 N at 70 cm from the fulcrum on the other side. What is the missing force in newtons?
22. 22.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a fixed pulley (b) a movable pulley
23. 23.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) through a distance (d) without moving it
24. 24.🏋️ Pushing a crate 4 m took 1200 J of work. What force was used, in newtons?
25. 25.Which of these is caused by magnetic force? (a) a fridge magnet sticks (b) a river flows downhill (c) shoes grip the floor (d) pedalling a cycle
26. 26.⚖️ A seesaw balances. Asha (240 N) sits 2 m from the pivot on one side; Kabir (? N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
27. 27.True or false: a door stopper is a wedge. (a) True (b) False
28. 28.⚖️ A lever bar balances. The load is 180 N at ? cm from the fulcrum. The effort is 40 N at 90 cm from the fulcrum on the other side. What is the missing distance in centimetres?
29. 29.💪 In which unit do we measure force? (a) metre (m) (b) newton (N) (c) second (s) (d) litre (L)
30. 30.🏋️ A machine lifts a load of 480 N when you push with 160 N. What is its mechanical advantage (MA)?
31. 31.🛞 More or less friction: a wheel on ball bearings? (a) less friction (b) more friction
32. 32.⚖️ A seesaw balances. Arjun (540 N) sits ? m from the pivot on one side; Asha (360 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
33. 33.💪 Is pressing a doorbell a push or a pull? (a) a push (b) a pull
34. 34.🪝 A bucket weighing 20 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
35. 35.🪝 A load of 400 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
36. 36.⚖️ Which class of lever is a fishing rod? (a) class 3 (b) class 2 (c) class 1
37. 37.True or false: a fixed pulley needs effort = load. (a) True (b) False
38. 38.Which of these is caused by gravity? (a) a rolling ball slows (b) rain falls to the ground (c) a magnet picks up pins (d) a fridge magnet sticks
39. 39.True or false: pulling a cart is a pull. (a) False (b) True
40. 40.⚖️ Going along a lever from one end to the other, the order is: fulcrum, load, effort. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2

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