Answer:
physic is branch of science in which math is its brother and will deal with the equation,law and evidence of natural phenomenon.
The formula for work is
F*d
Therefore work=2.0N*3.0=6N*m
Answer:

Explanation:
To find Depth D of lake we must need to find the time taken to hit the water.So we use equation of simple motion as:
Δx=vit+(1/2)at²

As we have find the time taken now we need to find the final velocity vf from below equation as

So the depth of lake is given by:
first we need to find total time as
t=3.0-1.01 =1.99 s
