6. One afternoon while out for a hot air balloon ride a woman accidentally drops

Question

6. One afternoon while out for a hot air balloon ride a woman accidentally drops her purse over

the edge of the gondola. The purse fall 300 m to the ground reaching a speed of 25 m/s upon

hitting the ground. How much energy was lost due to air resistance?

6. One afternoon while out for a hot air balloon ride a woman accidentally drops her purse over

the edge of the gondola. The purse fall 300 m to the ground reaching a speed of 25 m/s upon

hitting the ground. How much energy was lost due to air resistance?

Explanation / Answer

Initial potential of purse=mgh=m*9.8*300=2940m J

Fianl KE of purse=0.5mv2

                                =0.5*m*252=312.5m J

Energy lost=PE-KE=2940m-312.5m=2627.5 m J

where m is mass of purse

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