Answer:
9.61 m
Explanation:
d1 = 8 m north
d2 = 1 m north west
d3 = 1 m vertically down
Write the displacements in vector form




The resultant displacement is given by


The magnitude of displacement is given by
d =

d = 9.61 m
Gradpoint? The answer is B
Answer:
The velocity of the other fragment immediately following the explosion is v .
Explanation:
Given :
Mass of original shell , m .
Velocity of shell , + v .
Now , the particle explodes into two half parts , i.e
.
Since , no eternal force is applied in the particle .
Therefore , its momentum will be conserved .
So , Final momentum = Initial momentum

The velocity of the other fragment immediately following the explosion is v .
Gravity is pulling everything down . Without it, we all would be floating.
0.5mv^2
0.5 times 40 times 3^2
The kinetic energy is 180