Question

The trajectory of projectile projected from the origin is given by the equation y=x-
2x^2/5. The initial velocity of the projectile is a) 5 ms-1 b) 5/2 ms-1 c) 2/5 ms-1 d) 25 ms-1​

Answer 1

Answer:

Explanation:

OPTION A

Explanation:ACC TO EQUATION OF TRAJECTORY

y=xtan@-gx^2/(2u^2 cos^2@)--------1

y=x-2x/5---

@= angle of projection

by comparing equations 1 and 2

u=5 m/s