CBSE Class 11-science Answered
A ball is dropped onto a floor from a height of 20m. It rebounds to a height of 5m. If the ball is in contact with the floor for 6 milliseconds , find the magnitude of average acceleration during the contact
Asked by arunavamitra50 | 12 Oct, 2018, 01:00: PM
Expert Answer
initial velocity of the ball which is dropped from a height 20 m and when it reaches the ground =
final velocity of the ball when it just bounced back from the wall and reaches a maximum height of 5 m =
average acceleration = ( final velocity - initial velocity)/time = (9.9-19.8)/(6×10-3) = -1.65×103 m/s2
Answered by Thiyagarajan K | 12 Oct, 2018, 10:16: PM
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