Answer:
5.3 seconds
Step-by-step explanation:
Vx = Vx0 + Ax .T
A= de-acceleration
Vx =0 final at rest velocity
Vx0 = initial velocity
T= time to bring the object to a stop
therefore
0 = 52 m/s - (9.8 m/s^2) . T
-52 m/s/ -9.8 m/sec^2 =T
5.3 seconds= T