A closed system consists of a pendulum that is swinging back and forth. If the pendulum's kinetic energy decreases, what else must happen to the
energy of the system?
A. Its gravitational potential energy must decrease.
B. Its total mechanical energy must increase.
C. Its total mechanical energy must decrease.
D. Its gravitational potential energy must increase.

the small 0.38-kg slider is known to move from position a to position b along the vertical-plane slot. determine (a) the work done on the body by its weight and (b) the work done on the body by the spring. the distance r = 0.70 m, the spring modulus k = 154 n/m, and the unstretched length of the spring is 0.53 m

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-reverse card

energy can be converted from one form to another, but it cannot be created or destroyed in ordinary chemical or physical means. do not understand what you are asking but hope this

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wheres the pic

no

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no i dont know how to solve this you should probably try to google the answer