A car slows down to 80 m/s in 5 sec. Its retardation is found to be 2 m/s^2. calculate it's initial velocity
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Provided that:
- Final velocity = 80 m/s
- Time taken = 5 seconds
- Acceleration = -2 m/s
Don't be confused! Acceleration cames in negative because it is given that there is retardation founded in the car as it slows down and we also know that retardation is the inverse of acceleration and acceleration is positive.
Solution: What about the initial velocity of the given car!?
- The initial velocity of the given car = 90 metre per second
Using concept: First equation of motion
Using formula:
Where, v denotes final velocity, u denotes initial velocity, t denotes time taken and a denotes acceleration!!!!
Required solution:
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