### Home > CALC > Chapter 5 > Lesson 5.2.4 > Problem 5-95

5-95.

Find *s*(*t*). Then find *v*(*t*).

*s*(*t*) = −16*t*² + 144*t* + 0*v*(*t*) = −32*t* + 144

The ball is at rest whenever the velocity is equal to zero. What is happening to the ball at these times?

Remember that the ball has a velocity of zero at the peak of its parabolic flight.