Question

A car starting from rest uniformly accelerates and reaches a velocity in 10m/s in 5s. find its acceleration​

Answer 1

GIVEN :

• A CAR HAS STARTED FROM REST AND VELOCITY IN 5s IS 10m/s

TO FIND :

• ACCELERATION OF CAR

SOLUTION :

THE INITIAL VELOCITY (u) OF CAR IS ZERO BECAUSE THEY HAVE STATED THAT CAR HAS STARTED FROM REST

u = 0 , v = 10m/s , t = 5 sec

SO FROM FIRST EQUATIONS OF MOTION i.e ,

v = u + at

$= > 10 = 0 + a(5) \\ \\ = > 10 = 5a \\ \\ = > a = 2$

∴ ACCELERATION OF CAR = 2 m/s²

[ NOTE : HERE EQUATIONS OF MOTION OF MOTION ARE VALID SINCE THE CAR ACCELERATES UNIFORMLY . ]

Answer 2

Answer:

GIVEN :

A CAR HAS STARTED FROM REST AND VELOCITY IN 5s IS 10m/s

TO FIND :

ACCELERATION OF CAR

SOLUTION :

THE INITIAL VELOCITY (u) OF CAR IS ZERO BECAUSE THEY HAVE STATED THAT CAR HAS STARTED FROM REST

u = 0 , v = 10m/s , t = 5 sec

SO FROM FIRST EQUATIONS OF MOTION i.e ,

v = u + at

\begin{gathered} = > 10 = 0 + a(5) \\ \\ = > 10 = 5a \\ \\ = > a = 2\end{gathered}

=>10=0+a(5)

=>10=5a

=>a=2

∴ ACCELERATION OF CAR = 2 m/s²

[ NOTE : HERE EQUATIONS OF MOTION OF MOTION ARE VALID SINCE THE CAR ACCELERATES UNIFORMLY . ]