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Question
Q:- The speed of a car increases with constant acceleration of 4 kilometers/hour2. Its Initial Speed is 18 kilometers/hour, and Distance travelled in the time of this acceleration is 3744 kilometers
Find [1] How much is its Final speed.
Find [2] How much time of travel
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Step : 1
Final Speed2 - Initial Speed2] = [ 2 x Distance Travelled] x [ Acceleration
=> Final Speed2 = [ 2 x Distance Travelled] x [ Acceleration ] + Initial Speed2
=> Final Speed = square root of ( [ 2 x Distance Travelled] x [ Acceleration ] + Initial Speed2 )
=> Final Speed = square root of ( [ 2 x 3744 ] x [ 4 ] + 182 ) = 174 kilometers/hour
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Step : 2
Average Speed (when acceleration is constant)= [(Initial Speed + Final Speed) /2 ]
=>Sav = [ (18 + 174)/2 ] = 96 kilometers/hour
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Step : 3
Distance Travelled= Average Speed x Time of Acceleration
=>Distance Travelled / Average Speed = Time of Acceleration
=>3744 / 96 = 39 hours
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