Question

The displacement x of a particle moving in one dimension is related to time by the equation t = √(x + 3) where x is in meters and t in seconds. The displacement when velocity is zero is 

(1) 0m 

(2) 1m 

(3) 9m 

(4) 4m

Answer 1

Answer is (1) 0 m

t√(x + 3) or x = (t - 3)². 

ν = dx/dt = 2(t - 3) = 0

t = 3x.

x = (3 - 3)² = 0