How to assume air resistance has no effect on the rock

Reference no: EM1368861

Q. A dynamite blast at a quarry launches a rock straight upward, and 2.1s later it is rising at a rate of 14m/s. assuming air resistance has no effect on the rock, compute its speed

(a) at launch and
(b) 5s after launch.

Reference no: EM1368861

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