Answer :
The car can coast up to the height of 30.34m and (b) the thermal energy generated by friction is 118047.75J.
What is Kinetic energy?
The energy in which an object that has as a result of motion is called as kinetic energy. A force is applied to an object in instruct to accelerate it. We have to put the effort in order to apply the force. After the completion of the work the energy is removed from the item and then it moves at a new, constant speed.
What is Potential energy?
Potential energy is defined as the form of stored energy which is dependent on the ordering of system components.
(a) given; [tex]v=24.4m/s^{2}[/tex], [tex]g=9.81m/s^{2}[/tex]
KE(initial)= PE(final)
[tex]\frac{1}{2} mv^{2}[/tex]=[tex]mgh[/tex]
[tex]h=\frac{v^{2} }{2g}[/tex]
[tex]h=\frac{24.4^{2} }{2*9.81}[/tex]
h=30.34m
(b) If, in actuality, a 750 kg car with the same initial speed is observed to coast up a hill to a height 14.3 m above its starting point
E(friction)=KE(initial)-PE(final)
E(friction)=[tex]\frac{1}{2} mv^{2}-mgH[/tex]
E(friction) =[tex]\frac{1}{2}(750)24.4^{2} - (750)(9.81)(14.3)\\[/tex]
E(friction)=118047.75J
What is friction?
A friction is defined as the force which prevents two objects from moving against each other.
Learn more about friction
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