Given:
acceleration a = -0.392 m/s²
initial velocity v = 15.5 m/s
final velocity = v = 0 m/s
Unknown:
time t
Using the same equation:
[tex]t = \frac{final (v) - initial(v)}{acceleration (a)} = \frac{0 \frac{m}{s} - 15.5 \frac{m}{s}}{-0.392 \frac{m}{s^2} } = \frac{-15.5 \frac{m}{s} }{-0.392 \frac{m}{s^2} } = 39.5 s [/tex]
