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can any one check that my answer is right?

 
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Oct28-06, 04:01 PM   #1
 
Red face

can any one check that my answer is right?


Question:

A 5 kg ball is tossed into the air with an initial velocity of 6 m/s. I f the power delivered to the ball was 100 watts, over what time inteval did the power delivery occur?

my answer = 178m/s/s ?

oh bugger!!!
 
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Oct28-06, 04:17 PM   #2
 
Recognitions:
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First of all, if you're asked for a time interval, then your answer cannot contain acceleration units, i.e. [m/s^2].
 
Oct28-06, 04:47 PM   #3
rsk
 
What's the energy delivered to the ball?

How do you find time when you know energy and power?
 
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