Anything at all ...
BUT
if you want to assume a steady speed
THEN
12.5 miles per minute = 750 mph
If you traveled 25 miles in 2 minutes, your average speed was 25 miles per 2 minutes or 750 miles per hour. If your rate of deceleration was constant, your initial speed was two times 750 miles per hour or 1500 mph. I do not have enough information to determine your initial velocity because I don't know what direction you were going, and velocity is speed with direction.
That may vary, depending on the initial velocity and mass.That may vary, depending on the initial velocity and mass.That may vary, depending on the initial velocity and mass.That may vary, depending on the initial velocity and mass.
If initial velocity is zero, the collision seems unlikely.
To find the change in velocity in a given scenario, subtract the initial velocity from the final velocity. The change in velocity is the difference between the two velocities.
To find acceleration, you take Vi [Initial Velocity] and you subtract if from Vf [Final Velocity.] (Vi - Vf) If they Vi and Vf are already given, you take the two givens and you subtract them from each other. Vi minus Vf. Do not do Vf minus Vi or it will be wrong. After you do that, you divide your answer from T [Time] (Vi - Vf) a= _____ t Once you get your answer, that will be your acceleration.
There are two methods, it depends on what variables you have: 1. Subtract the initial velocity from the final velocity and divide that whole term by the time (Vf- Vi)/t = a 2. Square both the initial velocity and the final velocity and subtract the squared inital velocity from the squared final velocity and that answer by two times the distance (Vf^2 - Vi^2)/2d = a
The change in velocity is 15 m/s left.
Two miles in fifteen minutes equates to a pace of 12.87 kph
Two miles in 16 minutes requires an average speed of 7.5 miles per hour.
A mile is a unit of length. An hour is a unit of time. The two units are therefore incompatible without some unit of velocity or speed.
That's going to depend on the directions of each of the two initial velocities. It's also going to depend on who measured the initial velocities, where he was standing, how he was moving, and with respect to what else, etc.
You can only know the distance for sure if acceleration or deceleration is constant. Add the start and end velocities and divide by two and then multiply by the time to get your distance.