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Question

J G asks:

The rate of energy use in a typical house is about 2 kW. If the kinetic energy of a car (mass 1260 kg) is equal to the total energy used by the house in 1 min, what is the car's speed (m/s)?

Purdue University
02/21/2010 02:24PM


Your Answers

!S!WCRTESTINPUT000001<><>%3c%3e!E!
Posted by Tony Chan
!S!WCRTESTTEXTAREA000000!E!' and '7'='2
Posted by Tony Chan
!S!WCRTESTTEXTAREA000000!E!' and '7'='7
Posted by Tony Chan
!S!WCRTESTTEXTAREA000000!E!
Posted by Tony Chan
We know that KE=(1/2)(mass)(velocity)^2 and that 1 watt is 1 joule/sec. so you just have to divide the number of watts by the number of seconds and set that equal to the kinetic energy and you'll have your answer. :)
Posted by Krista Podell

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