kruskin9627
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Please help AP Physics!!!

A simple pendulum consists of a sphere tied to the end of a string of negligible mass. The sphere is pulled back until the string is horizontal and then released from rest. Assume gravitational potential energy is zero when the sphere is at its lowest point. What angle will the string make with the horizontal when the kinetic energy and the potential energy of the sphere-Earth system are equal?

Greater than 45°
Equal to 45°
Less than 45°
It cannot be determined without knowing the mass of the sphere.

Respuesta :

Answer:

Explanation:

Less than 45!

The angle that the string will make horizontally while Kinetic Energy and Potential Energy being equal of the sphere-Earth system would be:

C). Less than 45°

Given that,

Gravitational potential energy = 0

Mass = negligible

Since the body is released from the state of rest and the sphere is present its lowest point, the angle(θ) that it creates would be :

[tex]mgh =[/tex] [tex]\frac{1}{2} mv^2[/tex]                       ([tex]v = L,[/tex] θ)

θ = less than 45°.

θ < 45°

Thus, option C is the correct answer.

Learn more about "Kinetic Energy" here:

brainly.com/question/9349250

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