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Question
Q:- The speed of a car increases with constant acceleration of 5 kilometers/hour2 for 37 hours. And Distance travelled in the time of this acceleration is 3792.5 kilometers
Find [1] How much is its Initial speed.
Find [2] How much is its Final speed.
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Step : 1
Final Speed = Initial Speed + Acceleration x Time of Acceleration
Final Speed - Initial Speed =Acceleration x Time of Acceleration = 5 x 37 = 185 kilometers/hour
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Step : 2
Distance Travelled= [(Initial Speed + Final Speed) /2 ] x Time of Acceleration
2 x Distance Travelled x Time of Acceleration= [(Initial Speed + Final Speed) ] = 2 x 3792.5 / 37 = 205 kilometers/hour
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Step : 3
Final Speed - Initial Speed = 185 kilometers/hour
Final Speed + Initial Speed = 205 kilometers/hour
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Step : 4
( Final Speed + Initial Speed ) + ( Final Speed - Initial Speed ) = 205 + 185 kilometers/hour
2 x ( Final Speed ) = 205 + 185 kilometers/hour
( Final Speed ) = ( 205 + 185 )/2 kilometers/hour = 195 kilometers/hour
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Step : 5
( Final Speed + Initial Speed ) - ( Final Speed - Initial Speed ) = 205 - 185 kilometers/hour
2 x ( Initial Speed ) = 205 - 185 kilometers/hour
( Initial Speed ) = ( 205 - 185 )/2 kilometers/hour = 10 kilometers/hour
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