If a ball is thrown into the air with a velocity of 40 ft/s its height in feet t seconds later is given by y = 40t − 16t²

Question

.

(a) Find the average velocity for the time period beginning when t = 2 and

lasting

(i) 0.5 second (ii) 0.1 second (iii) 0.05 second (iv) 0.01 second

(b) Estimate the instantaneous velocity when t = 2.

Answer 1