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Kinematic Equations #2 & Free Fall #1 (In Hindi)
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Through this lesson we'll cover some important portion of kinematics and dynamics in short and also we'll discuss a lot questions related to each topic.

Kumar Ketan is teaching live on Unacademy Plus

Kumar Ketan
#6 years teaching experience #Physics Faculty in Kota #"magical education" (200k+ subs) #Follow for Physics of JEE NEET AIIMS etc. #Writer

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Sir thank you so much😘😘😘
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  2. 18.2k views unacademy Kumar Ketan Educator since January 2018 #6 years teaching experience #IIT JEE Physics #YouTuber (140k+ subs) #Unacademy educator(16k+ lifetimeviews) #Under graduate topper Follow me on the Unacademy Learning App 1k Followers Following Courses Get updates about new courses Watch all my lessons .Download slides and watch offline All courses HINDI Relative Motion (Hindi) Kinematics: Relative Motion Rain Drop and Boat River Proble.. 5.0 (5 ratings) Kumar Ketan Kumar Ketan


  3. CRAs4 Physics course for IIT JEE Kinematics & Dynamics 1D Non-Accelerated Motion 1D Accelerated Motion Force Frictional Force Newton's Law of Motion Relative Motion


  4. Kinematics equations for one dimensional motion If u- initial velocity, v - final velocity, a constant acceleration, S displacement magnitude or distance covered, then following relations are called kinematics equations


  5. v-u+ at Also average velocity is given by: Va u v)/2 The distance covered in nth second is given by: S-ua(2n-1)/2


  6. When the particle starts from rest, its initial velocity is zero i.e. u 0 The acceleration a is +VE when the particle speeds up and a is -VE when the particle speed down (retards)


  7. A horizontal wind is blowing with a velocity v towards north-east. A man starts running towards north with acceleration a. The time after which man will feel the wind blowing towards east is (a) v/a (c) v/V2a (b) V2v/a (d) 2v/a


  8. (j


  9. um


  10. It appears due east when, at 0 0


  11. FREE FALL A body falling under the action of gravity is known as freely falling body. The motion is known as free fall. Let us consider a body at height H. Two cases arise. (1) Body is dropped (u-0) (2) Body is thrown with some initial velocity


  12. (b) When body is thrown downwards with some initial velocity Let the initial velocity be u, a - g, then (2)v2 - u2 +2gH (3)s - ut h gt2


  13. (b) Time taken for downward motion Using v - u gt, we find Or u gt or t-u/g u.2)


  14. 1.2 sec :0.4 sed 0.8 sec u 12 m/s


  15. We take u at 0.8 sec h=ut + gt2 = 4 x 0.4- 10 (0.4)2 1.6-5 (0.16) = 1.6-0.8 = 0.8 m


  16. h -u2 g(2t-1) - 0 10(2t-1)/2 35 5 (2t -1) 7 2t-1 t 4 sec