Question

Exercise 2.40 K7 of 13 > Part A Constants 1 Periodic Table A foul ball leaves the bat going straight upward at 26 m/s How high does it rise? Express your answer using two significant figures. tn Submit Request Answer Part How long is it in the air? Neglect the distance between the bat and the ground Express your answer using two significant figures. Submit Request Answer

Answer 1

(a)

ball rises until v_f reach to 0

h = (v_f² - v_i²)/(2g)

h = (0 - 26²)/[2*(-9.8)]

h = 34.489 m

h = 34 m (two significant fig.)

(b)

total time in air is double the time it takes to rise

t = (v_f - v_i)/g

t = (0 - 26)/(- 9.8)

t = 2.653 s

2t = 5.3 sec