Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 80 · 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.💪 A box weighs 260 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
2. 2.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 12 N, ice 4 N, a glass sheet 5 N, a carpet 8 N. Which surface gave the least friction? (a) sandpaper (b) a carpet (c) ice (d) a glass sheet
3. 3.⚖️ Along a straight bar, measured from the left end, the effort is at 90 cm, the fulcrum at 10 cm and the load at 50 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
4. 4.🔍 Which is the odd one out? (a) a tyre with deep treads (b) a grippy rubber sole (c) a box pushed on carpet (d) a wet tiled floor
5. 5.Which of these is caused by muscular force? (a) squeezing a lemon (b) a thrown ball comes down (c) a river flows downhill (d) a rolling ball slows
6. 6.⚙️ Which simple machine is a bottle cap? (a) pulley (b) inclined plane (c) screw (d) lever
7. 7.⚖️ A lever balances when … (a) the bar is short (b) both weights are equal (c) the fulcrum moves (d) turning effects match
8. 8.⚖️ In a class 2 lever, what is in the middle? (a) the load (b) the axle (c) the fulcrum (d) the effort
9. 9.True or false: a playground slide is a lever. (a) False (b) True
10. 10.💪 Is pulling a cart a push or a pull? (a) a pull (b) a push
11. 11.🏋️ A machine lifts a load of 750 N when you push with 150 N. What is its mechanical advantage (MA)?
12. 12.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) on the fulcrum (b) far from the fulcrum (c) on the rock (d) near the fulcrum
13. 13.⚖️ A seesaw balances. Asha (? N) sits 1 m from the pivot on one side; Zoya (200 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
14. 14.⚖️ On a seesaw, a heavier child should sit … (a) anywhere (b) farther from the pivot (c) closer to the pivot (d) on the pivot
15. 15.💪 A box weighs 60 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
16. 16.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 10 cm and the load at 50 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
17. 17.True or false: pulling up your socks is a push. (a) False (b) True
18. 18.⚙️ A screw is really … (a) a ramp wrapped round (b) a kind of wheel (c) a tiny pulley (d) a bent lever
19. 19.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 11 N, ice 4 N, a glass sheet 5 N. Which surface gave the least friction? (a) sandpaper (b) a glass sheet (c) a carpet (d) ice
20. 20.💪 Two children push a box to the right, one with 55 N and the other with 80 N. What is the net (total) force on the box, in newtons?
21. 21.💪 A box weighs 330 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
22. 22.💪 Which force is at work: an apple falls down? (a) friction (b) muscular force (c) magnetic force (d) gravity
23. 23.True or false: a movable pulley only changes direction. (a) True (b) False
24. 24.⚙️ How many simple machines are there in the usual list? (a) 12 (b) 3 (c) 6 (d) 10
25. 25.🪝 A winch has a wheel of radius 15 cm and an axle of radius 5 cm. What effort on the wheel lifts a 180 N bucket on the axle, in newtons? (ideal)
26. 26.⚖️ A lever bar balances. The load is 600 N at 50 cm from the fulcrum. The effort is ? N at 60 cm from the fulcrum on the other side. What is the missing force in newtons?
27. 27.🔍 Which is the odd one out? (a) skating on ice (b) chalk on a gym bar (c) a smooth steel slide (d) a wheel on ball bearings
28. 28.⚙️ Which simple machine is a wheelchair ramp? (a) lever (b) screw (c) wheel and axle (d) inclined plane
29. 29.💪 Which force pulls everything towards the Earth? (a) magnetism (b) gravity (c) wind (d) friction
30. 30.🪝 A wheel and axle is a big wheel fixed to … (a) a flat ramp (b) a loose rope (c) a sharp wedge (d) a smaller rod (axle)
31. 31.True or false: a wet tiled floor gives less friction. (a) False (b) True
32. 32.💪 A box weighs 210 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
33. 33.🏋️ An 18 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
34. 34.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) helpful (b) a problem
35. 35.True or false: powder on a carrom board gives more friction. (a) True (b) False
36. 36.🏋️ A force of 270 N did 2700 J of work. How many metres did the object move?
37. 37.⚖️ A seesaw balances. Zoya (260 N) sits ? m from the pivot on one side; Asha (390 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?
38. 38.Which of these is caused by muscular force? (a) a thrown ball comes down (b) pedalling a cycle (c) shoes grip the floor (d) rain falls to the ground
39. 39.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 30 N at 60 cm from the fulcrum on the other side. What is the missing force in newtons?
40. 40.⚖️ A seesaw balances. Ravi (420 N) sits 2 m from the pivot on one side; Kabir (? N) sits 3 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