Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 181 · 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.🪝 What does a single fixed pulley change? (a) the size of the load (b) the colour of rope (c) gravity (d) the direction of pull
2. 2.💪 Is opening a drawer a push or a pull? (a) a push (b) a pull
3. 3.💪 A bag has a mass of 23 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
4. 4.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) effort ÷ load (d) load ÷ effort
5. 5.🪝 A load of 440 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
6. 6.⚖️ A seesaw balances. Asha (300 N) sits 1 m from the pivot on one side; Meena (? N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
7. 7.🪝 Fixed or movable pulley: which one stays in one place? (a) a fixed pulley (b) a movable pulley
8. 8.⚖️ Which class of lever is a nutcracker? (a) class 1 (b) class 2 (c) class 3
9. 9.Which of these is caused by gravity? (a) pedalling a cycle (b) brakes stop a bicycle (c) shoes grip the floor (d) a river flows downhill
10. 10.🪝 Fixed or movable pulley: which one only changes direction? (a) a movable pulley (b) a fixed pulley
11. 11.🛞 More or less friction: a wheel on ball bearings? (a) more friction (b) less friction
12. 12.💪 Is plucking a mango a push or a pull? (a) a pull (b) a push
13. 13.🏋️ A force of 60 N pushes a cart 1 m along the floor. How much work is done, in joules?
14. 14.⚖️ Which class of lever is a fishing rod? (a) class 3 (b) class 2 (c) class 1
15. 15.🏋️ A force of 170 N did 1020 J of work. How many metres did the object move?
16. 16.⚖️ A lever bar balances. The load is 630 N at 20 cm from the fulcrum. The effort is 180 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
17. 17.True or false: a fixed pulley makes you pull 2× rope. (a) True (b) False
18. 18.⚖️ A seesaw balances. Ravi (200 N) sits ? m from the pivot on one side; Arjun (400 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
19. 19.⚖️ On a seesaw, a heavier child should sit … (a) closer to the pivot (b) on the pivot (c) farther from the pivot (d) anywhere
20. 20.⚖️ What is the pivot point of a lever called? (a) the axle (b) the load (c) the effort (d) the fulcrum
21. 21.⚖️ Going along a lever from one end to the other, the order is: effort, fulcrum, load. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
22. 22.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) far from the fulcrum (b) on the rock (c) on the fulcrum (d) near the fulcrum
23. 23.True or false: a tug of war is a pull. (a) False (b) True
24. 24.True or false: a fixed pulley only changes direction. (a) False (b) True
25. 25.💪 A bag has a mass of 57 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
26. 26.💪 A force is a … (a) push or a pull (b) kind of colour (c) unit of time (d) type of sound
27. 27.⚙️ Which simple machine is a screw jack? (a) wheel and axle (b) inclined plane (c) screw (d) lever
28. 28.🏋️ A machine lifts a load of 600 N when you push with 150 N. What is its mechanical advantage (MA)?
29. 29.🔍 Which is the odd one out? (a) a smooth steel slide (b) a tyre with deep treads (c) a rough doormat (d) a box pushed on carpet
30. 30.🏋️ A force of 230 N did 920 J of work. How many metres did the object move?
31. 31.Which of these is a lever? (a) a crane hook block (b) a water tap handle (c) a truck loading ramp (d) a nutcracker
32. 32.🪝 A load of 960 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
33. 33.🏋️ A force of 30 N pushes a cart 5 m along the floor. How much work is done, in joules?
34. 34.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) no effort (d) less effort
35. 35.⚖️ A seesaw balances. Kabir (200 N) sits 4 m from the pivot on one side; Meena (800 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
36. 36.⚖️ A seesaw balances. Ravi (140 N) sits 4 m from the pivot on one side; Kabir (560 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
37. 37.🏋️ A 16 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
38. 38.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 70 cm and the load at 10 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
39. 39.⚖️ A lever balances when … (a) the fulcrum moves (b) the bar is short (c) both weights are equal (d) turning effects match
40. 40.⚖️ A seesaw balances. Ravi (360 N) sits 3 m from the pivot on one side; Meena (? N) sits 2 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