#1 a) Calculate the difference in kinetic energy when a 1300 kg car changes its speed&n
#1 a) Calculate the difference in kinetic energy when a 1300 kg car changes its speed from 90.0 m/s to 50.0 m/s.
b) How
much work is done
on the car by
friction force between
the tires and road?
Specify
the sign of
work.
please answer both as they go together
Homework Answers
a)
dKE = 0.5 m ( v^2 - u^2)
dkE = 0.5*1300* ( 90^2 - 50^2)
dKE = 3.64* 10^6 J
======
b)
workdone by frictional force = change in kE
W = - 3.64* 10^6 J
=====
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Add Answer to:
#1 a) Calculate the
difference in kinetic
energy when a 1300
kg car changes its
speed&n
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