An electron starting from rest has a velocity v that increases linearly with time t so that v=kt, where k=2 m/s^2.Find the distance covered by it in first three seconds?
a)18m
b}9m
c)6m
d)4m

Question

An electron starting from rest has a velocity v that increases linearly with time t so that v=kt, where k=2 m/s^2.Find the distance covered by it in first three seconds?
a)18m
b}9m
c)6m
d)4m

anonymous · Answer

This Can be Done in Two ways .... Do u Know Differentiation ?

anonymous · Answer

a = dv/dt = k

a = 2m/s^2

S = u + 1/2 a t^2

Here  u = 0  Since  V= kt    ( Initial t=0) 

so

S = 1/2 * 2 * 9 = 9 m

anonymous · Answer

This can be Also Done By Using Integration

S = intergral ( V)

S = kt^2/2  = 2 * 9/2 = 9 m

anoop27 · Answer

@Yahoo! Thanx bro(Yes I know both integration and differentiation)