Question

A body has an initial velocity of 3 ms- and has a constant acceleration of 1 ms normal to the direction
of the initial velocity. Then its velocity, 4 second after the start is
(A) 7 ms along the direction of initial velocity
(B) 7 ms' along the normal to the direction of the initial velocity
(C) 7 ms-mid-way between the two directions
(D) 5 ms- at an angle of tan
with the direction of the initial velocity
​

Answer 1

Answer:

Explanation:

COS 90 = 0