A point has a position vector given by r of t equals the vector with components t, 4 , for all time t ≥ 0 seconds. Find the speed of the object at t = 3 seconds

Question

A point has a position vector given by  , for all time t ≥ 0 seconds. Find the speed of the object at t = 3 seconds

A
B	1
C	0
D

Answer 1

v(t) = r'(t) = <1,0>

IIv(t)II = √1² + 0² = 1