A golfball comes to rest 1.9 seconds after hitting a net. The force of the net slowed the ball down at a rate of 56.3\s exponent 2. What was the velocity of the ball when it first hit the net? Show your explanation please.

Remember that the definition of acceleration is change in velocity divided by time:


a = \frac {\Delta v} {\Delta t}


You've been given values for a and \Delta t, now solve for \Delta v.