<span>A ball is thrown downward at 5ms from roof 10m high its velocity when it reaches the ground is 0 m/s. This is because it already dropped from the ground or x axis. So the velocity already stopped. </span>
Answer:


Explanation:
We are given that


We have to find the scalar product and the angle between these two vectors



Angle between two vectors is given by

Where
in degrees

Using formula
Where x= Coefficient of unit vector i
y=Coefficient of unit vector j


Using the formula

degrees
Hence, the angle between given two vectors=
Answer: A
Explanation:
The acceleration of gravity is always 9.8 m/s^2 downwards, even if the velocity is 0 m/s.
It can hurt and harm the body on many different and levels
Answer:
Primary succession is one of two types of biological and ecological succession of plant life, occurring in an environment in which new substrate devoid of vegetation and other organisms usually lacking soil, such as a lava flow or area left from retreated glacier, is deposited.