Answer the following question and make sure to give a full description to how you got your answer (ex. make sure to use blank rule in order to get blank answer) urgent
a car of mass 1800 kg moving with a speed at 90 km/hr is brought to rest by the application of disc brakes. find the average increase in temperature if the brakes if each of the four brakes has a mass of 4.5 kg. take the specific heat capacity of the brake material to be 680 j/kg degree c, and assume that all the kinetic energy, 562.5 kj, is changed into heat energy in the brakes.

note: the given question is incomplete.

complete question is given below.

which is an example of kinetic energy?

a. the energy stored in ethanol  

b. a hockey puck sliding across the ice  

c. a compressed spring  

d. a ball sitting at the top of a ramp

solution: the kinetic energy is the energy posses by the virtue of the motion of the object.

in the given options, a, c and d are the example of potential energy because it is the energy posses by the virtue of the rest of the object. but option b has the kinetic energy as the object is in motion.

hence, a hockey puck sliding across the ice   is the apex example of kinetic energy.

so, the option (b) a hockey puck sliding across the ice   is the correct option.

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