Agirl of mass mg is standing on a plank of mass mp. both are originally at rest on a frozen lake that constitutes a frictionless, flat surface. the girl begins to walk along the plank at a constant velocity vgp to the right relative to the plank. (the subscript gp denotes the girl relative to plank. use any variable or symbol stated above as necessary.)

1.) what is the velocity vpi of the plank relative to the surface of the ice?

2.) what is the girl's velocity vgi relative to the ice surface?

any understanding this would be appreciated.

Complete the sentence to describe the law of conservation of energy. the law of conservation of energy states that energy cannot be created or , but it can be

Will give brainliest! which statement best describes the difference between strong nuclear forces and weak nuclear forces? weak nuclear forces are involved when certain types of atoms break down. strong nuclear forces are responsible for holding atoms' nucleus together. weak nuclear forces hold bonds between atoms together. strong nuclear forces hold together the nucleus of an atom. strong nuclear bonds prevent atoms from falling apart. weak nuclear bonds prevent compounds from falling apart. strong nuclear forces are involved in breaking electrons from their shells. weak nuclear forces hold protons in the nucleus.

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