Can you help with these physics questions about motion? Please

Explanation:

5-) in the 1st system the right side is heavier, the system is moving in that way with a 9.8k m^2/s

in the 2nd system right side is heavier too, the system is moving in that way with a 9.8k m^2/s

in the 3rd system both sides got the same weight so the system isn't moving in anyway. 0 m^2/s

a) are muscles that have bands.

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when insulating materials rub against each other, they may become electrically charged . electrons , which are negatively charged, may be 'rubbed off' one material and on to the other. the material that gains electrons becomes negatively charged. the material that loses electrons is left with a positive charge.