Question

A bicycle increases its velocity from 10 km/h to 15km/h in 6 sec. calculate its acceleration

Answer 1

change in speed=5km/h=25/18 m/s
acceleration=(25/18)/6
=25/108

Answer 2

As we know that formula for acceleration is-

( Final velocity - Initial velocity) / Time taken

So, here Initial velocity = 10km/h = 10×5/18 m/s
= 25/9 m/s

Final velocity = 15km/h = 15×5/18 m/s =
= 25/6 m/s

Time taken = 6 sec

Acceleration =

{(25/6)-(25/9)} ÷ 6

= {(75-50)/18 }÷ 6

= 25/18 ÷ 6

= 25/18 × 1/6

= 25/18 × 1/6

= 25/108

= 0.22 m/s

Acceleration is 0.22 m/s