Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 915 · 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 is the odd one out? (a) a crane hook block (b) a flagpole rope wheel (c) a knife edge (d) a well-bucket rope wheel
2. 2.🪝 A wheel and axle is a big wheel fixed to … (a) a loose rope (b) a sharp wedge (c) a smaller rod (axle) (d) a flat ramp
3. 3.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, a carpet 8 N, sandpaper 10 N, ice 3 N. How many newtons more were needed on sandpaper than on ice?
4. 4.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 5000 N box up it, in newtons? (ideal ramp, no friction)
5. 5.🪝 A bucket weighing 90 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.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load × effort (d) load ÷ effort
7. 7.True or false: a rough doormat gives more friction. (a) False (b) True
8. 8.⚖️ In a class 2 lever, what is in the middle? (a) the load (b) the fulcrum (c) the axle (d) the effort
9. 9.💪 Two children push a box to the right, one with 55 N and the other with 70 N. What is the net (total) force on the box, in newtons?
10. 10.💪 In a tug of war, one team pulls right with 25 N and the other pulls left with 10 N. What is the size of the net force, in newtons?
11. 11.🔍 Which is the odd one out? (a) a playground slide (b) a claw hammer on a nail (c) a seesaw (d) a nutcracker
12. 12.🏋️ A longer ramp to the same height needs … (a) less effort (b) the same effort (c) more effort (d) no effort
13. 13.🏋️ A force of 390 N did 3900 J of work. How many metres did the object move?
14. 14.⚖️ A lever bar balances. The load is ? N at 20 cm from the fulcrum. The effort is 160 N at 30 cm from the fulcrum on the other side. What is the missing force in newtons?
15. 15.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 4 m, how many metres of rope must you pull?
16. 16.🛞 Why are tyres made with deep treads? (a) to grip the road (b) to go slower (c) to save rubber (d) to look nice
17. 17.True or false: a tyre with deep treads gives less friction. (a) False (b) True
18. 18.True or false: a tyre with deep treads gives more friction. (a) True (b) False
19. 19.⚖️ Going along a lever from one end to the other, the order is: load, effort, fulcrum. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
20. 20.True or false: powder on a carrom board gives more friction. (a) True (b) False
21. 21.Which of these is caused by magnetic force? (a) pedalling a cycle (b) a thrown ball comes down (c) lifting a school bag (d) a magnet picks up pins
22. 22.True or false: a grippy rubber sole gives less friction. (a) False (b) True
23. 23.🛞 More or less friction: oil on a squeaky hinge? (a) less friction (b) more friction
24. 24.💪 Which force is at work: a magnet picks up pins? (a) gravity (b) muscular force (c) magnetic force (d) friction
25. 25.🔍 Which is the odd one out? (a) a claw hammer on a nail (b) a nutcracker (c) a wheelchair ramp (d) a seesaw
26. 26.⚖️ Turning effect = force × … (a) mass of fulcrum (b) time taken (c) distance from fulcrum (d) colour of bar
27. 27.Which of these is a wedge? (a) a crane hook block (b) a bottle opener (c) a crowbar (d) a knife edge
28. 28.Which of these is caused by muscular force? (a) brakes stop a bicycle (b) squeezing a lemon (c) rain falls to the ground (d) a rolling ball slows
29. 29.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a movable pulley (b) a fixed pulley
30. 30.💪 Which force pulls everything towards the Earth? (a) wind (b) magnetism (c) friction (d) gravity
31. 31.🪝 Fixed or movable pulley: which one halves the effort? (a) a movable pulley (b) a fixed pulley
32. 32.💪 Two children push a box to the right, one with 10 N and the other with 45 N. What is the net (total) force on the box, in newtons?
33. 33.⚖️ A seesaw balances. Asha (330 N) sits ? m from the pivot on one side; Zoya (440 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
34. 34.🔍 Which is the odd one out? (a) an axe blade (b) a door stopper (c) a knife edge (d) a bottle cap
35. 35.⚖️ A seesaw balances. Zoya (? N) sits 3 m from the pivot on one side; Meena (300 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
36. 36.⚖️ Which class of lever is a pair of scissors? (a) class 2 (b) class 3 (c) class 1
37. 37.True or false: pushing a trolley is a pull. (a) False (b) True
38. 38.🛞 Is friction helpful or a problem here: walking without slipping? (a) a problem (b) helpful
39. 39.⚖️ 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
40. 40.⚖️ A seesaw balances. Asha (? N) sits 4 m from the pivot on one side; Kabir (800 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?

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