Question

a bus decreases its speed from 80 km/h to 60 km/h in 5 min. find the acceleration of the bus

Answer 1

u= initial velocity= 80 km/h = 22.2 m/s
v= final velocity = 60 km/h = 16.7 m/s
t= time = 5 min = 300s
a= acceleration = ?

a=v-u/t
a= 16.7-22.2/300
a= -5.5/5
Therefore, a=-0.018 m/s^2

Answer 2

Hi mate !!☺


Here's your answer looking for!!
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★↪first of all convert all in MKS system ,

80 km/hr = 80000/ 3600

=》800 / 36 = 200/ 9

=》22.22 m/s.

↪60 km/ hr = 60000/ 3600

=》600 / 36 = 100 / 6

=》16.67 m/s.

↪first of all equation in Motion ,

v = u + ft (formula to be used)

16.67 = 22.22 + f.5 

5f = -22.22 + 16.67 = - 5.55 

f = - 1.11 m/sec^2 

↪So acceleration is -1.11 m/s^2.

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hope it helps !!