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A particle is projected from a point on the ground with an initial velocity of \( u=50 \mathrm{~m} / \mathrm{s} \) at an angle of
\( \mathrm{P} \)
\( 53^{\circ} \) with the horizontal \( \left(\tan 53^{\circ}=4 / 3, g=10 \mathrm{~m} / \mathrm{s}^{2}=\right. \) acceleration due to gravity).
W
(1) The velocity of the particle will make angle \( 45^{\circ} \) with the horizontal after time \( 1 \mathrm{~s} \).
(2) The velocity of the particle will make angle \( 45^{\circ} \) with the horizontal after time \( 7 \mathrm{~s} \).
(3) The average velocity between the point of projection and the highest point on its path is horizontal.
(4) The average velocity between two points on same height will be horizontal.


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