Answer:
Shawn's kinetic energy is 61.45 J.
Explanation:
Given;
Mass of the system is, 
Displacement of the bike is, 
Time taken is, 
Let the constant velocity be
.
For constant velocity, magnitude of velocity is given as distance by time.
Therefore, 
Now, kinetic energy of a body is given as:

Here, 

Therefore, Shawn's kinetic energy is 61.45 J.
18.5164213 if you divide them both you get that number so the volceity is the number shown above.
Air spaces are used in insulation because air is a poor conductor.
Answer:
Gravitational force. Magnetic force. Electrostatics. Nuclear force.
Explanation:
Apple falling from a tree
raindrops falling from the sky