Physics problem about marbles. ?

Question

A marble is released from one rim of a hemispherical bowl of diameter 60.0 cm and rolls down and up to the opposite rim in 12.0 s.

Find the average speed.

Find the average velocity of the marble.

This is getting so annoying for me... it's so simple and yet I can't get them right. Could someone please help me????????

Answer 1

Average speed is (30 * pi )/12

Average velocity is 60/12

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