Question

A bs decrease its speed from 80km/h to 60km/h in 5 seconds. Calculate the acceleration of the bus. Plzzz.... it is important

Answer 1

Acceleration of the bus

$= \frac{v - u}{t} \\ = \frac{ \frac{50}{3} - \frac{200}{9} }{5} \\ = \frac{ \frac{ - 50}{9} }{5} \\ = \frac{ - 50}{9} \times \frac{1}{5} \\ = \frac{ - 10}{9} \: m {s}^{ - 2}$

The negative sign shows that the body has retarded.

HOPE THIS COULD HELP!!!

Answer 2

Question:

A bus decreases its speed from 80km/h to 60km/h in 5 seconds. Calculate the acceleration of the bus

Solution:

Initial velocity(u)

$\sf{\implies{80 km/h}}$

$\sf{\implies{22.2 m/s}}$

Final velocity(v)

$\sf{\implies{60 km/h}}$

$\sf{\implies{16.7 m/s}}$

$\sf{Time(t)=5 seconds}$

$\sf{a = \frac{v - u}{t}}$

$\sf{a = \frac{22.7-16.7}{5}}$

$\sf{a = \frac{5.5}{5} }$

$\boxed{\sf{a = 1.1m/s^2}}$

Samjha....