Physics, asked by ujjainshivam, 1 year ago

Find the initial velocity of a car if it can be a stop in 10 second by applying brakes which provide it a retardation of 2.5m/s².


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Answers

Answered by TPS
77
u = ?
v = 0
t = 10s
a = -2.5 m/s²

v = u +at
⇒ 0 = u + (-2.5)×10
⇒ 0 = u - 25
⇒ u = 25 m/s

Initial velocity was 25 m/s



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Answered by Anonymous
76
Hi there !!
Here's your answer

Let the initial Velocity be ' u '
The final Velocity = 0m/s [ the car comes to stop after sometime ]
Time taken = 10 sec
Acceleration (negative ) = -2.5m/s²

To find the initial Velocity , we will use the 1st equation of uniform motion :

v = u + at
0 = u + (-2.5)(10)
0 = u - 25
u = 25

Thus,
The initial Velocity is 25m/s

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Hope it helps :D

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