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Relative Motion #1 (In Hindi)
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In this lesson we'll discuss on the relative motion and try to deal with some important formulas

## 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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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. Relative Motion The laws of physics which apply when you are at reston the earth also apply when you are in any reference frame which is moving at a constant velocity with respect to the earth. For example, you can toss and catch a ball in a moving bus if the motion is in a straight line at constant speed.

5. The motion may have a different appearance as viewed from a different reference frame, but this can be explained by including the relative velocity of the reference frame in the description of the motion.

6. RELATIVE VELOCITY The time rate of change of position vector of arn object with respect to an observer (another object) is called a relative velocity of the object.

7. The relative velocity of a particle P1 moving with velocity vi" with respect to another particle P2 moving with velocity v2 is given by, See figure, here P1 and Pz are the particles moving with velocities V1 and v2 r spectively.

8. V1 2 P2

9. (i) If both the particles are moving in the same direction, then: 12 (ii) If the two particles are moving in the opposite direction, then:

10. (iii) If the two particles are moving in the mutually perpendicular directions, then: 12 (iv) If the angle between v1 and v2 be 0, ther

11. (i) Reverse the velocity of the observer. (ii) Superimpose the velocity of object upon reverse velocity of observer. So we obtain Vr V1-V2 (iii) Resultant velocity will be the relative velocity That is

12. They will have the same velocity at all t instants and hence their relative velocity is zero

13. Two particles P1 and P2 are moving with velocities v and v2 respectively. Which of the statement about the relative velocity Vr12 is true? (A)Vr12 cannot be greater than vi+V2 (B) Vr12 cannot be greater than vr-V2 (C) Vr12 > (Vi + V2) r12

14. Maximum value of relative velocity is Vi V2 and its minimum value is v1 V2

15. The relative velocity of a particle moving with a velocity v, with respect to itself is: (A)Zero (C) -v (B) v (D) none of the above