Physics:A speeder passes a parked police car at a constant speed of 38.1 m/s
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Physics:A speeder passes a parked police car at a constant speed of 38.1 m/s

[From: ] [author: ] [Date: 12-09-04] [Hit: ]
is overtaken by the police car?overtaken by the police car? (in meters)-When the cop catches up they will both have traveled the same distance D and taken the same time T to get that far.D = 38.1 .D = 1/2 .......
A speeder passes a parked police car at a
constant speed of 38.1 m/s. At that instant,
the police car starts from rest with a uniform
acceleration of 2.21 m/s2.

a:How much time passes before the speeder
is overtaken by the police car? (in seconds)

b:How far does the speeder travel before being
overtaken by the police car? (in meters)

-
When the cop catches up they will both have traveled the same distance D and taken the same time T to get that far.

For the speeder

D = 38.1 . T

For the cop

D = 1/2 . a . t^2 = 0.5 . 2.21 . T^2

38.1 T = 1.105 . T^2

T = 38.1 / 1.105 = 34.5 s

D = 34.5 . 38.1 = 1314 = 1310 m
1
keywords: of,at,passes,police,speeder,car,speed,38.1,parked,Physics,constant,Physics:A speeder passes a parked police car at a constant speed of 38.1 m/s
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