What is the kinetic energy?

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A racing car has a mass of 1670 kg. The acceleration of gravity is 9.8 m/s 2 . What is its kinetic energy if it has a speed of 120 km/h? Answer in units of J

Oct 19th, 2017

Please note that the kinetic energy T of a particle whose mass is m, and whose speed is v, is given by the subsequent formula:

T= (1/2) m v^2, substituting your numerical data into the above formula, we get:

T= (1/2)*1670*(33.3)^2=

= 926 KJoules (approximated value).

Please note that 120 Km/h are equivalent to 120/(3.6)=33.3 m/sec

Jan 27th, 2015

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