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  4. A particle of mass 0.01 kg is projected with velocity v = 2 hati m s-1 from point (x = 0, y = 20) . After 2 seconds, its position coordinates are

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Q. 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

JIPMERJIPMER 2012Motion in a Straight Line

Solution:

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 $(4, 20)$.