Question

A car starting from rest attains a speed of 54 kilometre per hour in 2 minutes calculate i)the acceleration of the car ii)the distance covered by the car to attain this velocity​

Answer 1

.•♫•♬•[ welcome to the concept of kinematics ].•♫•♬•

✨ Given:

u, intial speed = 0m/s

v = final speed =15 m/s or 54 km/hr

t = 2 min = 120 seconds .

1)

we know that

v = u + at

15 = 0 + a t

a = 15/t

$a = 0.125 \frac{m}{s {}^{2} }$

2) u = 0

we know that

s = (1/2 )at × t [ a = 0.125 = 1/8]

=(1/2 )(1/8) × 120× 120

= 900 m

            .•♫•♬•[ I hope it help you ❤️ ].•♫•♬•

Answer 2

✨ Given:

u, intial speed = 0m/s

v = final speed =15 m/s or 54 km/hr

t = 2 min = 120 seconds .

1)

we know that

a=v-u/t

a= 15m/s-0m/s/120s

a= 0.125m/s^2

2) u = 0

we know that

s = (1/2 )at × t [ a = 0.125 = 1/8]

=(1/2 )(1/8) × 120× 120

= 900 m

.•♫•♬•[ I hope it help you ❤️ ].•♫•♬•