Question

An object moves at a constant speed along a circular path in a horizontal plane with centre at the origin. When the object is at x = +2m, its velocity is - 4\(\hat{j}\) m / s . The object’s velocity (v) and acceleration (a) at x = –2 m will be

(1)  v = 4\(\hat{i}\) m / s, a 8\(\hat{j}\) m / s²

(2)  v = 4\(\hat{j}\) m / s, a 8\(\hat{i}\) m / s²

(3) v = -4\(\hat{j}\) m / s, a 8\(\hat{i}\) m / s²

(4)  v = -4\(\hat{i}\) m / s, a -8\(\hat{j}\) m / s²

Answer 1

(2)  v = 4\(\hat{j}\) m / s, a 8\(\hat{i}\) m / s²