Answer:
CONVEX
Explanation:
BECOZ IT HELPS TO GET A WIDER VIEW
Answer:
Explanation:
Given
height of building h=3 m
Landing velocity of diver
at an angle of 
Let u be the initial velocity of diver at an angle of \theta with horizontal
Since there is no acceleration in horizontal direction therefore horizontal component of velocity will remain same
---- -----1
Considering Vertical motion

here 




----------------2
Divide 2 and 1 we get



Thus 

Answer:
Explanation:
Net work done on the box = increase in kinetic energy
= 1 / 2 x 10 ( 5² - 3² )
= 80 J .