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An elevator is going up with an upward acceleration of $1 m / s^{2}$ . At the instant, when its velocity is 2 m/s, a stone is projected upward from its floor with a speed of 2 m/s relative to the elevator, at an elevation of $30 °$ . If the elevator was moving with a downward acceleration equal to g, how would the motion be altered?

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path is a curved line with constant velocity

is a parabolic line (uniform) with constant velocity

path is a non-uniform line with constant velocity

path is a straight line (uniform) with constant velocity

answer is D.

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Detailed Solution

In that case, relative acceleration between stone and elevator will be zero. So, with respect to elevator, path is a straight line (uniform) with constant velocity of 2 m/s at $30 °$ .

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