Question

A hailstone traveling with a velocity of 43 meters/second comes to a virtual stop 0.28 seconds after hitting water. What is the magnitude of its acceleration in the water?

A. 12 meters/second2
B. 1.5 × 102 meters/second2
C. 78.6 meters/second2
D. 6.5 × 10-3 meters/second2

Answer 1

1.5*10^2 meters/seconds^2

Step-by-step explanation:

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Answer 2

Magnitude of acceleration = (change in speed) / (time for the change) .

Change in speed = (ending speed) - (starting speed)

= zero - (43 m/s)

= -43 m/s .

Magnitude of acceleration = (-43 m/sec) / (0.28 sec)

= (-43 / 0.28) (m/sec) / sec

= 153.57... m/s²

= 1.5... x 10² m/s² .