Answer:
Explanation:
Given
Mass 

Net Force is equivalent to 
with tension T in the string
For mass 


For cylinder

I for solid cylinder is 
thus 
Substitute the value of T we get




This is what happens to the hydrogen gas in the core of the Sun. It gets squeeze together so tightly that four hydrogen nuclei combine to form one helium atom. This is called nuclear fusion. In the process some of the mass of the hydrogen atoms is converted into energy in the form of light.
Answer:
Since the hockey puck is moving at constant velocity
So here we will have

where we have
a = acceleration of the object
m = mass of object
so here since we know that acceleration is defined as rate of change in velocity
so here we will say that


so we have

so we will say that hockey puck is in equilibrium as there is no net force of it
.75(m/s)^2
Use this picture
If you know the two on the bottom you multiply them but if you only know the top and one on the bottom you divide