Question

A particle of mass 0.01 kg is projected with velocity $v ={ 2\hat{i} \, m \, s^{-1}}$ from point $(x = 0, y = 20)$ . After 2 seconds, its position coordinates are

• A. (4, 0)
• B. (20, 4)
• C. (0, 4)
• D. (4, 20)

Answer 1

Answer: (D)

(4, 20)

Answer 2

The particle is moving only along x-axis, whereas the location along y-axis does not change.
Displacement of particle along x-axis in time $t ={ 2 \,s}$ is $2 \times 2 = 4$ units.
Therefore, position coordinates of particle after ${2\, s}$ is $(4, 20)$.
So, the correct option is (D) : (4, 20).