find the initial velocity of a car which is stopped in 10 sec. by applying brakes. The retardation due to brakes is 2.5 m/s^2 ........
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GIVEN:
→Retardation if the car is (a)
→Time of retardation is 10s(t)
→Final velocity of the car is 0m/s(v)
(since the car is stopped using brakes)
TO FIND:
→The initial velocity of the car. (u)
SOLUTION:
By the first equation of motion we know that,
The symbols value are mentioned above in brackets.
On substituting the values, we have;
=>
=>
(Here a is -ve since the body is retarding)
=>
=>
=>
Therefore initial velocity of the car is 10m/s .
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