Please let it be legible, thanks in advance! Hw 5 P 6 A 1200 kg sports...

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Please let it be legible, thanks in advance!

Hw 5 P 6

Answer 1

Answer #1

Power is given by Energy/Time

When car accelerates,it increases its kinetic energy . so ,energy is only due to Kinetic energy .

Avg Power= (Final Kinetic energy-Initial Kinetic energy)/Time

Initial K.E=0 (since ,initial velocity is 0m/s)

Final K.E= mv²/2= 1200×30×30/2=540000J

Hence,Average Power= 540000/Time taken =540000J/11s=49,090.9091Watt

Average Power (in KW)=49.09 KW

Answer 2

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