Posted by **heather** on Sunday, February 27, 2011 at 12:58pm.

It takes 214 kJ of work to accelerate a car from 23.1 m/s to 29.3 m/s. What is the car's mass?

- physics -
**drwls**, Sunday, February 27, 2011 at 1:12pm
Work = 214,000 J

= difference in kinetic energy.

= (M/2)(V2^2 - V1^2)

Solve for M (in kg)

- physics -
**heather**, Monday, February 28, 2011 at 11:43am
so would it be 1/2(29.3-23.1)/214000

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