Physics, 25.10.2021 14:00, Lamr

Sorry for the bad quality picture! A frictionless pendulum with a mass of 0.4 kg and a length of 2.1 m starts at point A, at an angle 0 of 60°. As it swings downward, it passes through point B, which is 30 degrees from equilibrium. What is the kinetic energy of the pendulum at point B?

A) 3.9 J

B) 3.0 J

C) 1.1 J

D) 4.1 J

*Sorry for the bad quality picture!*

A frictionless pendulum with a mass of 0.4 kg and a length o

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*Sorry for the bad quality picture!* A frictionless pendulum with a mass of 0.4 kg and a length of...