Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 184 · 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.True or false: plucking a mango is a pull. (a) False (b) True
2. 2.🏋️ A force of 500 N did 3500 J of work. How many metres did the object move?
3. 3.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) through a distance (d) without moving it
4. 4.💪 Which force is at work: brakes stop a bicycle? (a) muscular force (b) gravity (c) friction (d) magnetic force
5. 5.⚖️ A lever bar balances. The load is 30 N at ? cm from the fulcrum. The effort is 30 N at 30 cm from the fulcrum on the other side. What is the missing distance in centimetres?
6. 6.💪 Which force is at work: a fridge magnet sticks? (a) gravity (b) friction (c) magnetic force (d) muscular force
7. 7.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) yes, always (d) no, work stays the same
8. 8.⚖️ A lever bar balances. The load is ? N at 40 cm from the fulcrum. The effort is 240 N at 30 cm from the fulcrum on the other side. What is the missing force in newtons?
9. 9.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 50 cm and the load at 0 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
10. 10.🔍 Which is the odd one out? (a) sand on a slippery path (b) a box pushed on carpet (c) a rough doormat (d) a wheel on ball bearings
11. 11.True or false: a box pushed on carpet gives more friction. (a) True (b) False
12. 12.⚖️ In a class 3 lever, what is in the middle? (a) the fulcrum (b) the load (c) the pulley (d) the effort
13. 13.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
14. 14.⚖️ Going along a lever from one end to the other, the order is: fulcrum, effort, load. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
15. 15.🛞 More or less friction: oil on a squeaky hinge? (a) less friction (b) more friction
16. 16.⚖️ A lever bar balances. The load is 70 N at 50 cm from the fulcrum. The effort is 50 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
17. 17.🔍 Which is the odd one out? (a) a road up a hill (b) a wheelchair ramp (c) a flagpole rope wheel (d) a playground slide
18. 18.True or false: a grippy rubber sole gives less friction. (a) False (b) True
19. 19.⚖️ Going along a lever from one end to the other, the order is: load, fulcrum, effort. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
20. 20.🔍 Which is the odd one out? (a) a well-bucket rope wheel (b) a crane hook block (c) a flagpole rope wheel (d) a wheelchair ramp
21. 21.True or false: a wet tiled floor gives less friction. (a) False (b) True
22. 22.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) powder on a carrom board (c) sand on a slippery path (d) a wheel on ball bearings
23. 23.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) helpful (b) a problem
24. 24.True or false: a nutcracker is a class 1 lever (fulcrum in the middle). (a) False (b) True
25. 25.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 7 N, a carpet 10 N, sandpaper 11 N, ice 3 N. How many newtons more were needed on sandpaper than on ice?
26. 26.🔍 Which is the odd one out? (a) skating on ice (b) a tyre with deep treads (c) a rough doormat (d) a grippy rubber sole
27. 27.🏋️ A machine lifts a load of 500 N when you push with 100 N. What is its mechanical advantage (MA)?
28. 28.True or false: a beam balance is a class 3 lever (effort in the middle). (a) False (b) True
29. 29.⚙️ Which simple machine is a bottle opener? (a) lever (b) inclined plane (c) wedge (d) pulley
30. 30.💪 A bag has a mass of 46 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
31. 31.Which of these is caused by gravity? (a) a compass needle turns (b) a rolling ball slows (c) an apple falls down (d) shoes grip the floor
32. 32.⚖️ A lever bar balances. The load is ? N at 30 cm from the fulcrum. The effort is 30 N at 70 cm from the fulcrum on the other side. What is the missing force in newtons?
33. 33.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) a tyre with deep treads (c) a box pushed on carpet (d) a grippy rubber sole
34. 34.⚖️ On a seesaw, a heavier child should sit … (a) on the pivot (b) anywhere (c) farther from the pivot (d) closer to the pivot
35. 35.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) a problem (b) helpful
36. 36.💪 Is pulling up your socks a push or a pull? (a) a pull (b) a push
37. 37.🪝 What does a single fixed pulley change? (a) the colour of rope (b) the direction of pull (c) the size of the load (d) gravity
38. 38.💪 A bag has a mass of 26 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
39. 39.💪 Is pulling a cart a push or a pull? (a) a pull (b) a push
40. 40.🔍 Which is the odd one out? (a) sand on a slippery path (b) a smooth steel slide (c) a rough doormat (d) a box pushed on carpet

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