Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 705 · 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 opening a drawer a push or a pull? (a) a pull (b) a push
2. 2.🪝 A bucket weighing 350 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
3. 3.⚖️ A lever balances when … (a) both weights are equal (b) the bar is short (c) the fulcrum moves (d) turning effects match
4. 4.🔍 Which is the odd one out? (a) a smooth steel slide (b) oil on a squeaky hinge (c) powder on a carrom board (d) sand on a slippery path
5. 5.⚖️ Along a straight bar, measured from the left end, the effort is at 60 cm, the fulcrum at 80 cm and the load at 30 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
6. 6.🛞 More or less friction: skating on ice? (a) more friction (b) less friction
7. 7.⚖️ Which class of lever is a seesaw? (a) class 1 (b) class 2 (c) class 3
8. 8.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) a wheel on ball bearings (c) a wet tiled floor (d) a tyre with deep treads
9. 9.True or false: powder on a carrom board gives more friction. (a) False (b) True
10. 10.⚖️ A lever bar balances. The load is 800 N at 10 cm from the fulcrum. The effort is 100 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
11. 11.💪 A cart is pulled to the right with 55 N and to the left with 65 N. Which way does the net force act? (a) no net force (b) to the left (c) to the right
12. 12.⚖️ Which class of lever is your forearm? (a) class 2 (b) class 3 (c) class 1
13. 13.True or false: a bottle cap is an inclined plane. (a) True (b) False
14. 14.💪 Which force is at work: rain falls to the ground? (a) muscular force (b) friction (c) gravity (d) magnetic force
15. 15.🏋️ A 16 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
16. 16.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load ÷ effort (d) load × effort
17. 17.💪 In a tug of war, one team pulls left with 75 N and the other pulls right with 70 N. What is the size of the net force, in newtons?
18. 18.True or false: a tyre with deep treads gives more friction. (a) False (b) True
19. 19.🪝 More rope sections holding a load means … (a) no change (b) less effort needed (c) the load floats (d) more effort needed
20. 20.⚙️ How many simple machines are there in the usual list? (a) 10 (b) 6 (c) 3 (d) 12
21. 21.Which of these is caused by muscular force? (a) pedalling a cycle (b) a thrown ball comes down (c) rain falls to the ground (d) a river flows downhill
22. 22.⚖️ Which class of lever is a nutcracker? (a) class 2 (b) class 1 (c) class 3
23. 23.💪 Is plucking a mango a push or a pull? (a) a push (b) a pull
24. 24.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) a problem (b) helpful
25. 25.⚖️ A seesaw balances. Zoya (? N) sits 1 m from the pivot on one side; Arjun (170 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
26. 26.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1950 N box up it, in newtons? (ideal ramp, no friction)
27. 27.⚖️ A lever bar balances. The load is 600 N at 20 cm from the fulcrum. The effort is 200 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
28. 28.🛞 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 2 N, a wooden plank 6 N. Which surface gave the most friction? (a) a wooden plank (b) a glass sheet (c) sandpaper (d) ice
29. 29.⚙️ Which simple machine is a claw hammer on a nail? (a) lever (b) wheel and axle (c) wedge (d) screw
30. 30.⚖️ A seesaw balances. Meena (400 N) sits ? m from the pivot on one side; Asha (200 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?
31. 31.💪 A box weighs 520 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
32. 32.Which of these is a pulley? (a) a playground slide (b) a window blind cord (c) a crowbar (d) a wood screw
33. 33.⚙️ Which simple machine is a flagpole rope wheel? (a) lever (b) pulley (c) wedge (d) screw
34. 34.Which of these is a screw? (a) a well-bucket rope wheel (b) a nutcracker (c) a nut and bolt (d) the tip of a nail
35. 35.True or false: a chisel is a wedge. (a) False (b) True
36. 36.🔍 Which is the odd one out? (a) a crane hook block (b) a nutcracker (c) a window blind cord (d) a flagpole rope wheel
37. 37.🏋️ Pushing a crate 10 m took 1000 J of work. What force was used, in newtons?
38. 38.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) a problem (b) helpful
39. 39.⚖️ On a seesaw, a heavier child should sit … (a) closer to the pivot (b) anywhere (c) farther from the pivot (d) on the pivot
40. 40.💪 Which force is at work: an apple falls down? (a) friction (b) muscular force (c) gravity (d) magnetic force

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