Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 356 · 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.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 6 N, sandpaper 7 N, a glass sheet 2 N, a wooden plank 3 N. How many newtons more were needed on sandpaper than on a glass sheet?
2. 2.💪 In a tug of war, one team pulls left with 40 N and the other pulls right with 5 N. What is the size of the net force, in newtons?
3. 3.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) more effort (d) less effort
4. 4.🏋️ Pushing a crate 4 m took 1600 J of work. What force was used, in newtons?
5. 5.True or false: a movable pulley stays in one place. (a) True (b) False
6. 6.💪 Which force is at work: a fridge magnet sticks? (a) friction (b) magnetic force (c) gravity (d) muscular force
7. 7.⚖️ In a class 1 lever, what is in the middle? (a) the effort (b) the load (c) the fulcrum (d) nothing
8. 8.💪 Two children push a box to the right, one with 65 N and the other with 5 N. What is the net (total) force on the box, in newtons?
9. 9.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
10. 10.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) very slowly (d) without moving it
11. 11.⚖️ Going along a lever from one end to the other, the order is: effort, load, fulcrum. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
12. 12.⚖️ A seesaw balances. Asha (? N) sits 1 m from the pivot on one side; Zoya (120 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
13. 13.⚙️ A screw is really … (a) a kind of wheel (b) a bent lever (c) a tiny pulley (d) a ramp wrapped round
14. 14.Which of these is caused by magnetic force? (a) pedalling a cycle (b) shoes grip the floor (c) a fridge magnet sticks (d) a river flows downhill
15. 15.Which of these is caused by friction? (a) a compass needle turns (b) a magnet picks up pins (c) a rolling ball slows (d) an apple falls down
16. 16.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, a carpet 9 N, sandpaper 10 N, a glass sheet 1 N. Which surface gave the most friction? (a) a glass sheet (b) a wooden plank (c) a carpet (d) sandpaper
17. 17.🏋️ In which unit is work measured? (a) joule (J) (b) newton (N) (c) watt hour (d) metre (m)
18. 18.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load ÷ effort (c) load + effort (d) effort ÷ load
19. 19.⚖️ A seesaw balances. Arjun (? N) sits 2 m from the pivot on one side; Meena (340 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
20. 20.🔍 Which is the odd one out? (a) chalk on a gym bar (b) a smooth steel slide (c) skating on ice (d) a wheel on ball bearings
21. 21.True or false: a rough doormat gives more friction. (a) True (b) False
22. 22.🪝 A pulley system lifts a 480 N load with an effort of 240 N. What is its mechanical advantage (MA)?
23. 23.🏋️ A force of 350 N did 3150 J of work. How many metres did the object move?
24. 24.⚖️ Which class of lever is a lemon squeezer? (a) class 1 (b) class 2 (c) class 3
25. 25.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a wooden plank 4 N, a carpet 5 N, sandpaper 6 N. Which surface gave the most friction? (a) ice (b) a carpet (c) sandpaper (d) a wooden plank
26. 26.🏋️ A force of 310 N did 1860 J of work. How many metres did the object move?
27. 27.🏋️ A machine lifts a load of 1200 N when you push with 200 N. What is its mechanical advantage (MA)?
28. 28.🛞 More or less friction: a box pushed on carpet? (a) less friction (b) more friction
29. 29.🛞 More or less friction: a rough doormat? (a) more friction (b) less friction
30. 30.True or false: drawing up a well bucket is a push. (a) True (b) False
31. 31.⚖️ A lever bar balances. The load is 120 N at 30 cm from the fulcrum. The effort is ? N at 20 cm from the fulcrum on the other side. What is the missing force in newtons?
32. 32.🏋️ Pushing a crate 8 m took 640 J of work. What force was used, in newtons?
33. 33.🛞 More or less friction: a grippy rubber sole? (a) more friction (b) less friction
34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 3 N, a wooden plank 5 N, sandpaper 6 N, ice 1 N. Which surface gave the least friction? (a) ice (b) a wooden plank (c) sandpaper (d) a glass sheet
35. 35.True or false: a truck loading ramp is a lever. (a) False (b) True
36. 36.⚙️ How many simple machines are there in the usual list? (a) 12 (b) 10 (c) 3 (d) 6
37. 37.⚖️ A seesaw balances. Arjun (220 N) sits 4 m from the pivot on one side; Zoya (440 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
38. 38.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a glass sheet 7 N, a carpet 10 N, sandpaper 14 N. Which surface gave the least friction? (a) a carpet (b) sandpaper (c) ice (d) a glass sheet
39. 39.💪 Is kicking a football a push or a pull? (a) a pull (b) a push
40. 40.💪 Is opening a drawer a push or a pull? (a) a pull (b) a push

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