Explain da whole concept of rel .vel ?

Question

i am havin a prob in understandin da whole of da concept n not able to solve properly all da qns..

help !!!

Answer 1

i am havin a prob in understandin yo question

Answer 2

Its depend that what type of confusion u r having.

OK if you are in train and train is moving now tell me how r u feeling about other passengers sitting with u, are they moving NO, Now if u will watch same passengers from out side the train u can say that they are moving with the train. This is the relative movement what u can feel. ONE OBJECT MOVING WITH RESPECT TO OTHER.

Answer 3

If you are sitting in a chair, you might believe that you are stationary.  But the chair could be on a moving bus so you are only stationary relative to the bus.  In fact though you and the bus are on the surface of the earth that rotates one turn each day and travels around the sun once each year while the sun is rotating about the center of the Milky Way galaxy.  In solving problems of relative velocity it is often necessary to name system boundaries.  For example if a car passes a bus at 5 MPH and the bus is traveling at 55 MPH the car must be going (5 + 55) MPH (and you can neglect the rotation of the earth, etc.).

Answer 4

Suppose if  you have  a bike and u r driving in one direction example East direction  and Ur bike speed is 60 km per hour   along a  road. Then you suddenly see a   Car  come from another direction  front of you and  car speed is 150 kph. How fast are the two of you, you and the  Car, closing each other?

The speed  would be 210 kph, the car's doing 150 and you're bike speed  60. both  are  comes from another direction The two velocity vectors add up because they are pointed at each other. Your bike  vector is east, while the car's vector is west.

Now, you biking  to the another  West Direction  as fast as you can away from the  Car . How fast are you closing now if you're running 80 kph?

That would be 90 kph, because now the two vectors are pointed in the same direction (both are pointed west ). Your bilke  and the car are going in the same direction, but the 90 kph means the car will eventually overtake your bike  because it is still closing on you

it means  relative velocity. Relative means in relation to something. for the  example, the relative velocity was the Car  velocity relative to your bike velocity as you biking and then go the road. if  you just still ur bike there and the  car run over you, the relative velocity would have been 150kph because your velocity would be zero, but the car is still doing 150 kph.

it means if u r crossing any person or thing to anothet direction then ur rel velocity is  added and the same direction ur velocity is less

Answer 5

You perhaps have an interesting question -- and the answer lies deep inside you -- "CONCENTRATION"  

Focus ankita thats all you will be able to solve properly all the questions after understanding the concepts :)  

Answer 6

relative velocity is nothing but velocity of one with respect to other. An object is said to have relative velocity with respect to other when they have different velocity.Use of vectors makes the relative velocity problems very easy. to see velocity of object 1 w.r.t. object 2. add the opposite velocity of 2 in velocity of object 1.

Answer 7

Suppose you are walking north at 5 kph along a country road.  Then you suddenly see a Mercedes come south over the hill in front of you at, say, 120 kph.  How fast are the two of you, you and the Mercedes, closing each other?

That would be 125 kph, the car's doing 120 and you're doing 5.  The two velocity vectors add up because they are pointed at each other.  Your vector is north, while the car's vector is south.

Now, being normal, you turn about and run south as fast as you can away from the Mercedes.  How fast are you closing now if you're running 15 kph?  

That would be 105 kph, because now the two vectors are pointed in the same direction (both are pointed south).  You and the car are going in the same direction, but the 105 kph means the car will eventually overtake you because it is still closing on you; so running down the road is not a good option for not getting squashed.

And that's relative velocity.  Relative means in relation to something.  In this example, the relative velocity was the Mercedes velocity relative to your velocity as you walked and then ran down the road.  Had you just stood there and let the car run over you, the relative velocity would have been 120 kph because your velocity would be zero, but the car is still doing 120 kph.

Answer 8

Wow, it's really difficult to understand what you're asking.  If I had to guess, perhaps you mean "relative velocity"?  If that's the case, do a search on it in Google and you'll probably get some really good explanations.

Answer 9

the best way to solve relative velocity problems is that assume as if one of the objects is stationary then add its speed to other object depending on the direction of their movement.

Objects moving in same direction:-

suppose A is moving with speed of 10km/hr.

suppose B is moving with 20km/hr.

stop A and subtract its velocity to other object.

relative velocity of b with respect to a would be 10km/hr.

Objects moving in different direction.

suppose A is moving with speed of 10km/hr.

suppose B is moving with 20km/hr.

stop A and add its velocity to other object.

relative velocity of b with respect to a would be 30km/hr.

basic concept is relative velocity needs 2 objects to calculate relative velocity of one of them with respect to other one.

Assume as if one of the objects is stationary and then calculate relative velocity.

Regards..

Answer 10

I'm guessing this is a question about relative velocity, but I can't be sure...Can you be more explicit?

Answer 11

why dnt ya stt 1st with tryn to rite rite & then tink bout akg bout da concepts?