Question

2019 Spring Phys 2110-001-Sokolov Ch 02 HWw xercise 2.8 Part A A bird is flying due east. Its distance from a tall building is given byre) 34.0(12.m 03 What is the velocity of the bird when t-5.00 s ? Express your answer with the appropriate units v18.3 Previous Answers

Answer 1

here,

the instantaneous displacement , x(t) = 34 m + ( 12.6 m/s) t - 0.036 t^2

differentiating the equation for v(t)

v(t) = 12.6 - 0.108 * t^2

at t = 5 s

v(5) = 12.6 - 0.108 * 5^2 m/s

v(5) = 9.9 m/s