### Home > CALC > Chapter 5 > Lesson 5.1.3 > Problem 5-29

5-29.

*h*(*t*) = −16*t*^{2} + *v*_{0}*t* + *s*_{0}

The tennis ball turns around when *v*(*t*) = 0.

Evaluate *v*(time of impact). Let *h*(*t*) = 0 to find the time of impact.

5-29.

*h*(*t*) = −16*t*^{2} + *v*_{0}*t* + *s*_{0}

The tennis ball turns around when *v*(*t*) = 0.

Evaluate *v*(time of impact). Let *h*(*t*) = 0 to find the time of impact.