2. A 50.0 kg shell was fired from a cannon at earth's surface to a maximum height of 400. m.
a. What is the potential energy at maximum height?
b. It then fell to a height of 100. m. What was the loss of PE as
it fell?

a) 196000 Joules

b) 147000 Joules

Explanation:

a. Potential energy is the energy possessed by an object by virtue of its position.

m= mass of object = 50.0 kg

g = acceleration due to gravity =

h = height of an object = 400 m

Putting in the values we get:

Thus the potential energy at maximum height is 196000Joules.

b.    

Thus loss in P.E = (196000Joules-49000Joules) = 147000 Joules

so easy. just google the electromagnetic waves and it’ll pop up.