How does friction affect the IMA of a machine?

Friction is another force that energy gets "wasted" on in the dragging. ... Therefore, the machine gives you less mechanical advantage when too much friction is involved because it wastes energy. It also makes it less efficient!

i believe it is b. what was the cause of the big bang

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c because the action was the roller coaster reaches bottom of hill (action) reaction would be blood tends to drain away from head

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