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How many joules and kilocalories are generated when the brakes are used to bring a 1300-kg car to rest from a speed of 95 km/h?
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Energy generated when brakes are applied
Answer to Problem 6P
Solution:
Energy generated when brakes are applied is 452642 J or 10.813 kcal
Explanation of Solution
Given:
is 95 km/h
is 1300 kg
Formula Used:
The formula used is kinetic energy
Where,
is the kinetic energy
is the velocity
is the mass
Also the conversion formula is need: 1000 Calories is 4186 J
Calculation:
is 95 km/h
The conversion of km/h is done by
When is 95 km/h it can be converted using m/s
is 26.4 m/s
Inserting the given values in the kinetic energy formula:
J
If 4186 J is 1000 Calories is, then 452642 J is Calories or 10.813 kcal
Chapter 14 Solutions
Physics: Principles with Applications
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