a bus decreases its speed from 80 km/hr to 60km/hr in 5 sec. find the

1.	a bus decreases its speed from 80 km/hr to 60km/hr in 5 sec. find the acceleration of the bus??? give ans step by step in understandable way plzzzzzzzz...
Answer» Given:- Initial velocity of bus (u) = 80km/h Final velocity of CAR bus(v) = 60km/h Time taken (t) = 5S. To Find:- Acceleration of the bus(a). Solution :- FIRSTLY we change the velocity of bus in m/s Initial velocity = 80× 5/18 = 400/18=200/9 m/s Final velocity = 605/18 = 300/18 = 150/9m/s By USING first equation of motion ⟹ v = u+at Put the value which is given above ⟹ 200/9 = 150/9 + a5 ⟹200/9 - 150/9 = a 5 ⟹50/9 = a 5 ⟹a = 5.55/5 ⟹a = 1.11 m/s² Additional Information !! The rate of change of velocity at PER unit time is called acceleration . ✧ SI unit of acceleration is m/s² ✧ It is vector Quantity ( both magnitude and direction).

a bus decreases its speed from 80 km/hr to 60km/hr in 5 sec. find the acceleration of the bus??? give ans step by step in understandable way plzzzzzzzz...

Answer»

Given:-

Initial velocity of bus (u) = 80km/h

Final velocity of CAR bus(v) = 60km/h

Time taken (t) = 5S.

To Find:-

Acceleration of the bus(a).

Solution :-

FIRSTLY we change the velocity of bus in m/s

Initial velocity = 80× 5/18 = 400/18=200/9 m/s

Final velocity = 60*5/18 = 300/18 = 150/9m/s

By USING first equation of motion

⟹ v = u+at

Put the value which is given above

⟹ 200/9 = 150/9 + a*5

⟹200/9 - 150/9 = a *5

⟹50/9 = a *5

⟹a = 5.55/5

⟹a = 1.11 m/s²

Additional Information !!

The rate of change of velocity at PER unit time is called acceleration .

✧ SI unit of acceleration is m/s²

✧ It is vector Quantity ( both magnitude and direction).

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