Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 389 · 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 force is at work: a compass needle turns? (a) muscular force (b) gravity (c) friction (d) magnetic force
2. 2.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
3. 3.🏋️ A force of 100 N did 400 J of work. How many metres did the object move?
4. 4.💪 A bag has a mass of 28 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
5. 5.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) joule (J) (d) newton (N)
6. 6.Which of these is caused by gravity? (a) lifting a school bag (b) a compass needle turns (c) a rolling ball slows (d) a thrown ball comes down
7. 7.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) near the fulcrum (b) far from the fulcrum (c) on the fulcrum (d) on the rock
8. 8.🔍 Which is the odd one out? (a) a smooth steel slide (b) a wheel on ball bearings (c) a rough doormat (d) skating on ice
9. 9.🪝 A winch has a wheel of radius 8 cm and an axle of radius 2 cm. What effort on the wheel lifts a 320 N bucket on the axle, in newtons? (ideal)
10. 10.True or false: pulling up your socks is a push. (a) False (b) True
11. 11.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 11 N, sandpaper 13 N, a glass sheet 3 N, a wooden plank 7 N. Which surface gave the most friction? (a) sandpaper (b) a glass sheet (c) a wooden plank (d) a carpet
12. 12.🔍 Which is the odd one out? (a) a crane hook block (b) a flagpole rope wheel (c) a steering wheel (d) a well-bucket rope wheel
13. 13.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 4250 N box up it, in newtons? (ideal ramp, no friction)
14. 14.True or false: skating on ice gives less friction. (a) True (b) False
15. 15.⚙️ Which simple machine is a flagpole rope wheel? (a) lever (b) screw (c) wheel and axle (d) pulley
16. 16.⚖️ A lever balances when … (a) the bar is short (b) both weights are equal (c) turning effects match (d) the fulcrum moves
17. 17.🏋️ A force of 500 N did 5000 J of work. How many metres did the object move?
18. 18.💪 In which unit do we measure force? (a) metre (m) (b) second (s) (c) litre (L) (d) newton (N)
19. 19.🏋️ A machine lifts a load of 500 N when you push with 100 N. What is its mechanical advantage (MA)?
20. 20.💪 Which force pulls everything towards the Earth? (a) gravity (b) wind (c) friction (d) magnetism
21. 21.Which of these is caused by friction? (a) brakes stop a bicycle (b) a thrown ball comes down (c) pedalling a cycle (d) squeezing a lemon
22. 22.True or false: chalk on a gym bar gives more friction. (a) True (b) False
23. 23.🪝 A load of 1120 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
24. 24.💪 In a tug of war, one team pulls left with 60 N and the other pulls right with 40 N. What is the size of the net force, in newtons?
25. 25.💪 Which force is at work: rain falls to the ground? (a) gravity (b) magnetic force (c) muscular force (d) friction
26. 26.🔍 Which is the odd one out? (a) a tyre with deep treads (b) a smooth steel slide (c) a wet tiled floor (d) powder on a carrom board
27. 27.Which of these is caused by friction? (a) rain falls to the ground (b) an apple falls down (c) shoes grip the floor (d) a river flows downhill
28. 28.🪝 Fixed or movable pulley: which one halves the effort? (a) a movable pulley (b) a fixed pulley
29. 29.True or false: a fixed pulley rises with the load. (a) True (b) False
30. 30.True or false: oil on a squeaky hinge gives more friction. (a) False (b) True
31. 31.🔍 Which is the odd one out? (a) chalk on a gym bar (b) skating on ice (c) a wet tiled floor (d) a wheel on ball bearings
32. 32.🪝 A pulley system lifts a 1080 N load with an effort of 270 N. What is its mechanical advantage (MA)?
33. 33.🛞 More or less friction: skating on ice? (a) more friction (b) less friction
34. 34.True or false: powder on a carrom board gives more friction. (a) True (b) False
35. 35.🔍 Which is the odd one out? (a) a bottle opener (b) a nutcracker (c) a seesaw (d) an axe blade
36. 36.🔍 Which is the odd one out? (a) a round doorknob (b) a water tap handle (c) a steering wheel (d) a screw jack
37. 37.💪 Which force is at work: shoes grip the floor? (a) muscular force (b) magnetic force (c) gravity (d) friction
38. 38.🔍 Which is the odd one out? (a) a grippy rubber sole (b) sand on a slippery path (c) a wet tiled floor (d) a box pushed on carpet
39. 39.⚖️ Going along a lever from one end to the other, the order is: fulcrum, load, effort. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
40. 40.⚙️ How many simple machines are there in the usual list? (a) 10 (b) 12 (c) 3 (d) 6

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