Question

A body is moving with a constant acceleration of 11î + 7ĵ, starting from the origin. What will be the position of the body after 10s?

(a) 550î + 350ĵ

(b) 350î + 550ĵ

(c) 350î – 550ĵ

(d) 550î – 350ĵ

The question was asked at a job interview.

My question is from Motion in a Plane with Constant Acceleration in portion Motion in a Plane of Physics – Class 11

Answer 1

Correct answer is (a) 550î + 350ĵ

To explain: The body’s displacement is given by s = (1/2)at^2. The body starts from the origin hence, the total displacement is the final position of the body. Therefore, after putting in the values, we get, s = (1/2)(11î + 7ĵ)*10^2 = 550î + 350ĵ.