Kwok is standing on top of a 160-foot building and throws a tennis ball straight up with an initial velocity of 24 ft/sec. Homework Help ✎
How far up does the tennis ball go before it turns around and starts to come down?
How fast is it going when it hits the ground below?
h(t) = −16t2 + v0t + s0
The tennis ball turns around when v(t) = 0.
Evaluate v(time of impact). Let h(t) = 0 to find the time of impact.