Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 459 · 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 simple machine is the tip of a nail? (a) screw (b) pulley (c) inclined plane (d) wedge
2. 2.🏋️ Pushing a crate 10 m took 4700 J of work. What force was used, in newtons?
3. 3.🪝 A load of 140 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
4. 4.🔍 Which is the odd one out? (a) sand on a slippery path (b) a grippy rubber sole (c) a rough doormat (d) powder on a carrom board
5. 5.🪝 A bucket weighing 460 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
6. 6.True or false: a movable pulley halves the effort. (a) False (b) True
7. 7.🪝 Fixed or movable pulley: which one halves the effort? (a) a movable pulley (b) a fixed pulley
8. 8.⚙️ Most simple machines make work easier by letting us … (a) switch off gravity (b) make new energy (c) use a smaller force (d) stop all friction
9. 9.⚖️ A lever bar balances. The load is ? N at 50 cm from the fulcrum. The effort is 250 N at 40 cm from the fulcrum on the other side. What is the missing force in newtons?
10. 10.🪝 A load of 600 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
11. 11.🏋️ An 18 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
12. 12.True or false: a tyre with deep treads gives less friction. (a) False (b) True
13. 13.⚖️ Which class of lever is a beam balance? (a) class 1 (b) class 3 (c) class 2
14. 14.⚖️ A seesaw balances. Meena (180 N) sits 1 m from the pivot on one side; Arjun (? N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
15. 15.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a wooden plank 9 N, sandpaper 11 N, ice 3 N. Which surface gave the most friction? (a) ice (b) a glass sheet (c) sandpaper (d) a wooden plank
16. 16.⚖️ A lever bar balances. The load is ? N at 40 cm from the fulcrum. The effort is 120 N at 40 cm from the fulcrum on the other side. What is the missing force in newtons?
17. 17.🔍 Which is the odd one out? (a) a grippy rubber sole (b) skating on ice (c) sand on a slippery path (d) a box pushed on carpet
18. 18.💪 Is opening a drawer a push or a pull? (a) a pull (b) a push
19. 19.Which of these is a lever? (a) a steering wheel (b) a seesaw (c) a window blind cord (d) a wheelchair ramp
20. 20.True or false: a fixed pulley hangs on the rope loop. (a) True (b) False
21. 21.⚖️ A seesaw balances. Meena (180 N) sits 4 m from the pivot on one side; Arjun (? N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
22. 22.🛞 More or less friction: chalk on a gym bar? (a) more friction (b) less friction
23. 23.🏋️ A force of 200 N pushes a cart 6 m along the floor. How much work is done, in joules?
24. 24.⚙️ Which simple machine is a window blind cord? (a) pulley (b) screw (c) wedge (d) lever
25. 25.True or false: pulling a cart is a push. (a) True (b) False
26. 26.🔍 Which is the odd one out? (a) a road up a hill (b) a round doorknob (c) a steering wheel (d) a well winch handle
27. 27.💪 Is pulling a cart a push or a pull? (a) a push (b) a pull
28. 28.🏋️ A force of 320 N pushes a cart 2 m along the floor. How much work is done, in joules?
29. 29.True or false: a nut and bolt is a screw. (a) False (b) True
30. 30.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, sandpaper 10 N, ice 4 N, a wooden plank 6 N. Which surface gave the most friction? (a) a wooden plank (b) ice (c) sandpaper (d) a carpet
31. 31.🏋️ A machine lifts a load of 300 N when you push with 50 N. What is its mechanical advantage (MA)?
32. 32.⚖️ 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
33. 33.⚙️ Which simple machine is a well-bucket rope wheel? (a) lever (b) pulley (c) wedge (d) wheel and axle
34. 34.⚖️ A seesaw balances. Kabir (320 N) sits ? m from the pivot on one side; Meena (320 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?
35. 35.True or false: a fishing rod is a class 1 lever (fulcrum in the middle). (a) False (b) True
36. 36.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load × effort (c) effort ÷ load (d) load + effort
37. 37.⚖️ Turning effect = force × … (a) mass of fulcrum (b) distance from fulcrum (c) colour of bar (d) time taken
38. 38.🏋️ A machine lifts a load of 640 N when you push with 160 N. What is its mechanical advantage (MA)?
39. 39.🛞 More or less friction: a wheel on ball bearings? (a) less friction (b) more friction
40. 40.💪 In a tug of war, one team pulls right with 65 N and the other pulls left with 50 N. What is the size of the net force, in newtons?

Free engineering lessons, practice and worksheets at talentjr.in/engineering-for-kids