Question

2. A bus decreases its speed from
80 km h to 60 km h in 5 s.
Find the acceleration of the bus.​

Answer 1

Given:-

• Initial velocity ,u = 80km/h
• Final velocity ,v = 60km/h
• Time taken ,t = 5 s

To Find:-

• Acceleration ,a

Solution:-

⠀⠀⠀⠀⠀⠀⠀⠀⠀According to the Question

Firstly we change the unit of velocity .

Initial velocity ,u = 80 × 5/18 = 400/18 = 22.22 m/s

Final velocity ,v = 60 × 5/18 = 300/18 = 16.66

As we know that acceleration is defined as the rate of change in velocity

• a = v-u/t

where,

• v denote final velocity
• u denote initial velocity
• t denote time taken
• a denote acceleration

Substitute the value we get

$:\implies$ a = 16.66-22.22/5

$:\implies$ a = -5.56/5

$:\implies$ a = -1.12 m/s²

here, negative sign show retardation

• Hence, the acceleration of the bus is approximately 1.12 m/s²

Answer 2

A bus decreases it’s speed from 80Kilometre per hour in 5 second . Find the Acceleration of the bus