When we throw an object vertically upwards its initial velocity: a. it will be less than the final
b. it will be greater than the final
c. it will be equivalent to the final
d. it remains constant until reaching its maximum height

Its initial velocity will be greater than final velocity so option (b) will be correct option  

Explanation:

As we throw the any object vertically the motion of the object will be opposes by the gravity.

And as the velocity of object is opposes by gravity, the final velocity goes on decreasing and finally it becomes zero.

So the initial velocity is always greater than final velocity when the object is thrown vertically upward.

So option (b) will be the correct option  

54 degrees incident angle = reflected angle

angle is from normal turned to line of ray

answer///isobars;