Awell-thrown ball is caught in a well-padded mitt. if the deceleration of the ball is 2.10×10^{4} 4 m/s^{2} 2 , and 1.85 ms (1 ms =10^{-3} −3 s) elapses from the time the ball first touches the mitt until it stops, what was the initial velocity of the ball?

u = - 38.85 m/s^-1

Explanation:

given data:

acceleration = 2.10*10^4 m/s^2

time = 1.85*10^{-3} s

final velocity = 0 m/s

from equation of motion we have following relation

v = u +at

0 =  u + 2.10*10^4 *1.85*10^{-3}

0 = u + (21 *1.85)

0 = u + 38.85

u = - 38.85 m/s^-1

negative sign indicate that the ball bounce in opposite directon

the second one and the forth one are in the purple because they are opinions and the rest are in the yellow

explanation:

answer: option c.

explanation: