Find Velocity of Two Moving Objects: Formula for Relative Speed Calculation

[missie]

what formula can i use when i wanted to find out the velocity of two moving object?

like 2 car going foward on the same road but different speed. Car 1 in front is at 30m/s and car 2 in back is going 60m/s. how can i find the velocity of car b relative to car a?

 

[Monitor16807]

Let's say car A was moving at 30m/s and car B was also at moving at 30m/s, if they looked at each other they wouldn't be moving, so their relative velocity is 0.
But if a car C was moving at 60m/s both car A and B would agree it was moving at 30m/s.

So the formula is quite simple: relative V=V1-V2=60m/s-30m/s=30m/s.
Also V2-V1 doesn't equal -30m/s, it only means I think you're going at 30m/s in the other direction.

Always think of it as if the first variable was standing still.

 

[sir-pinski]

To find the velocity of two moving objects, we can use the formula for relative speed calculation. This formula is given by Vr = V2 - V1, where Vr represents the relative speed between the two objects, V2 is the velocity of the second object, and V1 is the velocity of the first object. In the scenario given, we can plug in the values to find the relative speed of car B (V2) with respect to car A (V1).

Therefore, the relative speed between the two cars would be Vr = 60m/s - 30m/s = 30m/s. This means that car B is moving 30m/s faster than car A in the same direction.

It is important to note that the relative speed only tells us the difference in velocities between the two objects. To find the actual velocities of each car, we would need to know the direction of motion as well. In this case, we can assume that both cars are moving in the same direction, but if they were moving in opposite directions, we would need to consider the signs of their velocities in the formula.

In conclusion, the formula for relative speed calculation is a useful tool for finding the velocity of two moving objects in relation to each other. By plugging in the velocities of each object, we can determine the relative speed and understand the motion of the objects in relation to one another.