A 1,240 kg car going 30 m/s is brought to a stop using its brakes. Let's assume that a total of approximately 30 kg of iron in the brakes and wheels absorbs the heat produced by the friction. (a) What was the car's original kinetic energy (in J)? J (b) After the car has stopped, what is the change in temperature (in °C) of the brakes and wheels? °C

A 1,240 kg car going 30 m/s is brought to a stop using its brakes. Let's assume that a total of approximately 30 kg of iron in the brakes and wheels absorbs the heat produced by the friction. (a) What was the car's original kinetic energy (in J)? J (b) After the car has stopped, what is the change in temperature (in °C) of the brakes and wheels? °C

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Question

A 1,240 kg car going 30 m/s is brought to a stop using its brakes. Let's assume that a total of approximately 30 kg of iron in the brakes and wheels absorbs the heat produced by the friction.

(a)

What was the car's original kinetic energy (in J)?

(b)

After the car has stopped, what is the change in temperature (in °C) of the brakes and wheels?

°C

A 1,240 kg car going 30 m/s is brought to a stop using its brakes. Let's assume that a total of approximately 30 kg of iron in the brakes and wheels absorbs the heat produced by the friction.
(a) What was the car's original kinetic energy (in J)?
J
(b) After the car has stopped, what is the change in temperature (in °C) of the brakes and wheels?
°C

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