Question

speed is 108km/hr. time is 10 seconds. what is its acceleration?​

Answer 1

v2 - u2= 2 a S -------- eq.1

v=final velocity

u=initial velocity

a=accelerartion(in this case retardation)

S=distance travelled

On solving;

by converting given speeds which are in km/hr to m/s by multiplying the speeds by 5/18;

we get, accelaration=-2 m/s or -0.555km/hr.(- sign indicates retardation)

v = u + a t -------eq.2

t=time taken.

time taken = 10 sec on solving.