Question

A bus moving with 72km/h Driver sudden apply break and bus stopped apply break and bus stopped in 5s. find displacement of bus after applying break?

Answer 1

The answer is 50 m

Explaination :

Given u = 72 km/h = 20 m/s t= 5 s v= 0

By applying newton's first equation we get

0= 20 + a*5

a= 4 m/s*s

now putting value of a in newton's third equation we get

S= -20*20/2*4

= 50 m

Answer 2

Answer:

The answer is 50 m

Explaination :

Given u = 72 km/h = 20 m/s t= 5 s v= 0

By applying newton's first equation we get

0= 20 + a*5

a= 4 m/s*s

now putting value of a in newton's third equation we get

S= -20*20/2*4

= 50 min

Explanation: