Answer a,b, and c with show of work.

Question

A projectile is shot upward 2 meters above the surface of the earth with an initial velocity of 108 meters per second. The position function is s(t)= -4.9t^2+108t+2

a) write the velocity function

b) write the acceleration function

c) what is the velocity of the ball after 4 seconds?

Answer 1

velocity: v(t) = -9.8t + 108, m/sec

acceleration a(t) = -9.8 m/sec/sec

To answer part c, just plug 4 in for t in the velocity equation.