How do you find relative speed between two objects?

When two bodies move in the same direction then the Relative Speed = Difference of Speeds i.e for a person a sitting in a train moving with a speed of 60 km/hr in the west direction, another train which is going towards the west with a speed of 40 km/hr, will appear to move at a Speed of (60-40) = 20 km/hr.

What is the formula for relative velocity?

Key Equations

Position vector	→r(t)=x(t)^i+y(t)^j+z(t)^k
Relative velocity equation connecting two reference frames	→vPS=→vPS′+→vS′S
Relative velocity equation connecting more than two reference frames	→vPC=→vPA+→vAB+→vBC
Relative acceleration equation	→aPS=→aPS′+→aS′S

What is relative speed in math?

Relative speed is the rate at which two moving bodies are separating from / coming closer to each other. 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.

How do you find the relative velocity of two cars?

Starts here5:552-D Relative Motion – YouTubeYouTubeStart of suggested clipEnd of suggested clip51 second suggested clipWe’re told that two cars are traveling as shown the velocity velocity of a is 60 miles per hourMoreWe’re told that two cars are traveling as shown the velocity velocity of a is 60 miles per hour eastward. And the velocity of b is 100 miles per hour north of east.

When relative velocity is zero?

The relative velocity becomes zero when the two bodies move in the same direction with the same velocity. When a person sits on the chair, the relative velocity of the person with respect to the chair is zero. The relative velocity of the chair with the person is also zero.

Why do we find relative speed?

Relative Speed Formula Consider two bodies moving at a different speed in the same direction. Now, we know that the relative speed is the speed of one object with respect to another. So, if time after which both the body moves is given, Suppose, time = t hrs.

What is relative velocity Ncert?

Relative Velocity. Relative Velocity. This is the velocity of an object relative to some other object which might be stationary, moving slowly, moving with same velocity, moving with higher velocity or moving in opposite direction.

How do you find the relative speed of a train?

Train Speed Formula 1. x km/hr = x*(5/18) m/s. 3. Time taken by the train of length/meters to pass a pole or a single post or a standing man is equal to the time taken by the train to cover / meters.

What is relative velocity Class 8?

Answer: Relative velocity is defined as the velocity of an object B in the rest frame of another object A. 2) A motorcycle travelling on the highway at a velocity of 120 km/h passes a car travelling at a velocity of 90 km/h.

What is the relative speed of a particle?

The relative speed requires specifying a frame of reference. The frame of reference for the given particle speeds is one in which the particles are moving toward each other, so in that same frame of reference they will be moving at 1.6c relative to each other.

What is the relative velocity of 2 objects with the same speed?

According to the Lorentz Transformation Equation the relative velocity of 2 object moving with speeds pretty close to ‘c’,their relative velocity is given as: Where v and u are the speeps of the objects.Since both their speeds are same, put v=u=0.8c Putting the values of v and u in above equation and get the value as 0.975c.

What is the velocity of particle 2 in the reference frame?

In the lab frame, let particle 2 be travelling to the right with speed 0.9 c. It follows that, in the reference frame of particle 2, the lab has a velocity of v = − 0.9 c.

Which direction is the particle 2 moving?

This time we get the correct sign, since, relative to particle 1, particle 2 is moving in the negative x direction. To correctly apply the relativistic velocity addition formula, one must properly identify the velocities u and v in the formula. From the reference frame of the lab, there is a particle, particle 1, with velocity u.