A750-kg car moving at 23 m/s brakes to a stop. assume that all the kinetic energy is transformed into thermal energy. the brakes contain about 15 kg of iron, which absorbs the energy. what is the increase in temperature of the brakes?

The temperature of the brakes is 29.38°C.

Explanation:

Given that,

Mass of car = 750 kg

Speed = 23 m/s

Mass of iron = 15 kg

We need to calculate the kinetic energy of car

Using formula of kinetic energy

We need to calculate the temperature of the brakes

Using formula of energy

Put the value into the formula

Hence, The temperature of the brakes is 29.38°C.

answer: a. same unit

explanation:

  distance on the y-axis and time on the x-axis.

explanation:

the instantaneous velocity = change in position/time taken

the slope of the graph should give instantaneous velocity.

  slope of a graph = change in value of y -axis / change in values of x -axis

  comparing both the equations

    change in value of y -axis = change in position

  change in values of x -axis = time taken

so position values should be on the y axis and time values should be on the x axis.

distance on the y-axis and time on the x-axis.