A hailstone traveling with a velocity of 43 meters/second comes to a virtual stop 0.28 seconds after hitting water. What is the magnitude of its acceleration in the water?

V = Vo + a*t = 0

43 + a*0.28 = 0
0.28a = -43
a = -153.6 m/s^2

To find the magnitude of the hailstone's acceleration in the water, we can use the following formula:

acceleration = (final velocity - initial velocity) / time

Given:
Initial velocity (u) = 43 m/s
Final velocity (v) = 0 m/s
Time (t) = 0.28 s

Substituting the values into the formula, we get:

acceleration = (0 m/s - 43 m/s) / 0.28 s

Now, let's calculate the acceleration:

acceleration = (-43 m/s) / 0.28 s

Simplifying the expression:

acceleration ≈ -153.57 m/s²

Therefore, the magnitude of the hailstone's acceleration in the water is approximately 153.57 m/s².