Class 9 Physics Chapter 11 | Kinetic Energy (Numericals) - Work, Energy, and Power скачать в хорошем качестве

Class 9 Physics Chapter 11 | Kinetic Energy (Numericals) - Work, Energy, and Power

👉Previous Video:    • Class 9 Physics Chapter 11 | Kinetic Energ...   👉Next Video:    • Class 9 Physics Chapter 11 | Potential Ene...   ✔️📚👉 Watch Full Free Course: https://www.magnetbrains.com ✔️📚👉 Get Any Class & Subject's Topic Video Here:- https://www.magnetbrains.com/get-topi... ✔️📚👉 Get All Subjects Playlists: ​https://www.pabbly.com/out/all-videos... ✔️📚👉 Grab Notes by Expert Teachers Here: https://www.pabbly.com/out/magnet-brains ✔️📚👉 Place Your Queries For Books Here: https://www.magnetbrains.com/booklet ✔️📚👉 Get Books Prepared by Our Expert Teachers at Your Door Step: https://www.magnetbrains.com/book_pur... =============================================== 📢 Full Playlist Link:   • Class 9 Physics (New Session 2023-24) | Co...   ✅ In this video, ✔️ Class: 9th ✔️ Subject: Physics ✔️ Chapter: Work, Energy, and Power (Chapter 11) ✔️ Topic Name: Kinetic Energy - Numericals ✔️ Topics Covered in This Video: Chapter 11 Work, Energy, and Power- Kinetic Energy - Numericals =============================================== 00:00 Introduction 00:45 Kinetic Energy 12:40 Numericals 22:54 Websites Overview =============================================== 📢 🔥 Available (Kindergarten to 12th) all Video Subject wise Playlist https://www.pabbly.com/out/all-videos... Why study from Magnet Brains? Magnet Brains is an online education platform that helps give You NCERT/CBSE curriculum based free full courses from Kindergarten to Class 12th so that you can perform well in any and all exams you give in your academic career. 👉 Contact us 🤑🤑 ➡️ Connect with us : [email protected] ➡️ Website : https://www.magnetbrains.com/ ➡️ Subscribe to us on YouTube: https://www.youtube.com/MagnetBrainsE... ➡️ Facebook :   / magnet-brains-education-110955641184512   ➡️ Instagram :   / magnetbrains   ➡️ Telegram : https://t.me/magnetbrainsbhopal Points covered in this video:- Kinetic Energy The kinetic energy processed by an object of mass m and moving with a uniform velocity v is Kinetic energy (K.E) = ½ mv2 If the mass of a body is doubled/halved its K.E also gets doubled/ halves. If the velocity of a body is doubled or halved its KE becomes four times / one fourth respectively. Numericals Question. An object of mass 15 kg is moving with a uniform velocity of 4 m s-1. What is the kinetic energy possessed by the object? Solution. Mass of the object, m = 15 kg, Velocity of the object, v = 4 m s–1 . From Eq. , EK = ½ mv2 = ½ x 15 kg x 4 ms-1 x 4 ms-1 = 120 J The kinetic energy of the object is 120 J. Question. What is the work to be done to increase the velocity of a car from 30 km h-1 to 60 km h-1 if the mass of the car is 1500 kg? Solution. Mass of the car, m = 1500 kg, initial velocity of car, u = 30 km h-1 = 30 × 1000m/ 60 × 60s = 25/3 ms-1 Similarly, the final velocity of the car, v = 60 km h-1 = 50/3 m s-1 Therefore, the initial kinetic energy of the car, Eki = ½ mv2 = ½ x 1500 kg x (25/3)2 ms-1 = 156250/3 J . Disclaimer: "This video is for educational and informational purposes only and is not intended to infringe on any copyrights. If you believe that this video has used any copyrighted material in a way that constitutes copyright infringement, please contact us at [email protected] and we will take appropriate action."