Monday, March 12, 2012

Surfing For Reaction Distance Increases?

Carol asks…kinetic energy...................?If the speed of the car is increased by 50%, by what factor will its minimum breaking distance
be increased, assuming all else is the same? Ignore the drivers reaction timeNancy answers:Final velocity = 0
Hence using the eqution of motion v^2 = u^2 + 2as
u1^2 = -2aS1
u2^2 = -2aS2

S2/S1 = ^2

It is given that u2/u1 = 1.5.

S2/S1 = ^2 = 1.5^2 = 2.25
=================================Mary asks…Physics --- Work and Energy --- Please

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