The answer is to this question is B
Answer:According to the Equation (2), centripetal force is proportional to the square of the speed for an object of given mass M rotating in a given radius R.
Explanation:The Period T. The time T required for one complete revolution is called the period. For. constant speed. v = 2π r T holds.
A=mgh
m=300g=0.3kg
g=9,81 m/s^2
h=10m
A=29.43J
