3. The height y and the distance x ...
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3. The height y and the distance x along the horizontal plane of a projectile on a certain planet (with no surrounding atmosphere) are given by y = (8t - 5t?)m and x = 6t m, where t is seconds. The velocity of the projectile is (a) 6 m s-1 (b) 8 ms-1 (c) 10 m s-1 (d) data is not sufficient.

NEET/Medical Exams
Physics
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( y=8+-5 t^{2} ) ( y=4 y+-frac{1}{2} y+2 ) ( 4 y=8 ) ( y=frac{4(20)}{4 x}=6 ) ( u: sqrt{4 y^{2}+4 x^{2}=128+62} ) ( x=10 x / 3 )
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