Question

A particle is projected at angle θ with speed u from the ground.
The speed of particle when it is moving at angle α from the
ground is -
(1) u cos α
(2) u cosθ · cosα
(3) u cosθ · secα
(4) u cosα · secθ

Answer 1

Answer:

option 1 is correct

Explanation:

when we take components cos is taken along the angle line and sin perpendicular to angle

Answer 2

Refer the attachment provided above.

Hope this helps!