# What is the formula to find relative velocity of two bodies A and B?

## What is the formula to find relative velocity of two bodies A and B?

Case 4: Two bodies moving in the opposite direction. Also, if A and B are moving with same velocity V in the opposite direction ( i.e., VA = VB = V), then the relative velocity of A with respect to B is given by, v – (-V) = 2V = – relative velocity of B with respect to A.

How do you find relative velocity with respect to B?

The relative velocity of A with respect to B= velocity of the body A – velocity of the body B.

How do you calculate the relative speed of two objects moving in the opposite direction?

When two bodies move in opposite direction, then the Relative Speed = Sum of Speeds i.e for e.g. for a person sitting in a train moving with a Speed of 40 km/hr in the west direction, another train which is going towards east with a Speed of 40 km/hr, will appear to move at a Speed of (40+40) = 80 km/hr.

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### What is relative velocity of a body?

Definition of relative velocity : the vector difference between the velocities of two bodies : the velocity of a body with respect to another regarded as being at rest — compare relative motion.

What is velocity of ground with respect to B?

Hence, velocity of ground w.r.t train B is 90 km/h towards north.

What does a relative to B mean?

The velocity of an object A relative to another object B is the velocity that object A would appear to have to an observer moving with B. To you, sitting on the stationary train (A), or to a person on the platform, the moving train (B) appears to be travelling at a velocity v away.

#### What is relative speed ks3?

Relative speed. Objects moving in the same direction towards, or away from, each other. Fastest speed – slowest speed. Objects moving in opposite directions towards, or away from, each other. Add the two speeds together.

How do you calculate relative distance?

For example, if two persons are moving at 10 km/h and 20 km/h in opposite directions, then their relative speed would be 10 + 20 = 30 km / h, i.e., the distance between them after one hour would be 30 km.

What is the relative velocity for the bodies moving in the opposite direction?

The relative velocity between any two bodies moving in opposite direction is equal to sum of the velocities of two bodies .

## What is the initial velocity of a 2 kg body?

A body of mass 2 kg has an initial velocity of 3 m/s along OE and it is subjected to a force of 4 Newton’s in of direction perpendicular to OE. What will the distance of the body from O after 4 seconds be? A body of mass 2 kg has an initial velocity of 3 m/s along OE and it is subjected to a force of 4 Newton’s in of direction perpendicular to OE.

How do you find the relative velocity with respect to B?

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V A B → = 3 2 + 4 2 = 5 km/s at angle of 36.9 0 North of West. To do relative velocity questions you have to make one of the bodies stationary. The question says ‘with respect to B’ – that means you have to make B stationary. WE do this by subtracting the veloicity of B from B (we get the answeer zero of course).

What is the constant velocity of the body in the equation?

In the equation, x 0 is the displacement at time t, v is the constant velocity of the body . The SI unit of velocity is m/s (m⋅s−1). Other units and dimensions of velocity are given in the table below.

### How do you calculate relative speed of two bodies?

Relative Speed of 2 bodies = Sum of their individual speeds if they are moving in the opposite direction = Difference of their individual speeds if they are moving in the same direction. Consider A and B starting at the same time, travelling in the opposite direction with a speed of 20 kmph and 30 kmph and they have to travel a distance of 200 km.