Question

a ball thrown vertically upwards with a speed of 20 m/s strikes a target after peneterating a distance of 0.01 in target.calculate the reterdation produced by target.

Answer 1

V^2 = Vo^2 + 2a*d.
a = (V^2-Vo^2)/2d =

Answer 2

d = 2.54cm/in * 0.01in 0.0254 cm = 2.54*10^-4 m.

V^2 = Vo^2 + 2a*d.
a = (V^2-Vo^2)/2d =(0-400)/5.08*10^-4 = -7.87*10*5 m/s^2.