Calculating power output of a car

Thread starter cherrydeee
Start date Oct 3, 2010
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To calculate the power output of a 1200kg car accelerating from 25 km/hr to 100 km/hr in 12 seconds, the change in kinetic energy is determined, leading to a power output of approximately 24.44 kW. For the skiing scenario, the potential energy at the top of a 300ft slope is converted to kinetic energy at the bottom, with the skier's speed of 60 ft/sec indicating that about 78% of the initial potential energy was dissipated. Both calculations involve fundamental physics principles, including energy conservation and the work-energy theorem. The discussions emphasize the importance of understanding energy transformations in different contexts. These calculations illustrate practical applications of physics in real-world scenarios.

Oct 3, 2010

cherrydeee

1.)what is the power output of a 1200kg car that can go from 25 km/hr to 100 km/hr in 12 secs. Neglecting air resistance and rolling friction.

2.)a woman skis down a slope 300ft high. her speed at the foot of the slope is 60 ft/sec. what percentage of her initial potential energy was dissipated?

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Oct 3, 2010

The legend

cmon show how you attempted the problem.

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