Question

A bus starts from the rest and attains 40 km/hr velocity after 10 seconds. Calculate the acceleration of the bus in km/hr sq and in m/s sq

Answer 1

here's your answer __________⭐⭐


Bus starts from rest , it means initial velocity of bus , u = 0
↪Bus attains 40 km/h velocity after 10sec

final velocity of bus , v = 40 km/h = 40 × 5/18 m/s [ we know, 1 km/h = 5/18 m/s ]
v = 100/9 m/s
Time taken by bus , t = 10sec

↪we should use formula,
v = u + at
from above , v = 100/9 m/s , u = 0 and t = 10sec
Now, 100/9 = 0 + a × 10
⇒ 100/9 = 10a
⇒ a = 10/9 m/s²
Hence, acceleration of bus in m/s² = 10/9 m/s²

↪Now, acceleration of bus in Km/h²
v = 40 km/h , u = 0 and t = 10sec = 10/3600 hr = 1/360 hr

↪Now, from formula ,
$V \: = u + at$

40 = 0 + a × 1/360
40 = a/360
a = 40 × 360 = 14400 km/h²

↪Hence, (a) 14400 km/h²

(b) 10/9 m/s²

$hope \: it \: helps$