Answer to Question #300972 in Physics for Rohosafi

Question #300972

A 1200kg car going 30m/s applies its brakes and skids to rest. If the friction force between sliding tiresband pavement is 600N. How far does the car skids before coming tonrest.

1
Expert's answer
2022-02-22T08:52:47-0500

Given:

v0=30m/sv_0=30\:\rm m/s

m=1200kgm=1200\:\rm kg

F=600NF=600\:\rm N

The energy-work theorem says

0mv022=W=Fd0-\frac{mv_0^2}{2}=W=-Fd

The distance traveled before car coming to the rest

d=mv022F=12003022600=900md=\frac{mv_0^2}{2F}=\frac{1200*30^2}{2*600}=900\:\rm m


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