Question

A ball is projected horizontally with a velocity of 3 ms-1 what is the velocity of the ball after 0.4 second ? given=10ms-2​

Answer 1

ux=3 m/s

uy=0 m/s

v=?

t=0.4 sec

Applying 1st equation of motion

vy=uy+gt

=0+9.8×0.4

=3.92 m/s

Now finding the resultant of the both components

________

vfinal= √u2x+u2y

_______

v f= √32+3.922

______

v f = √24.3664

velocity (final)≈4.936 m/s