Which force best represents fg? a. a weight lifter is pushing a barbell upward with a force of 90 n. b. the weight of a barbell acting on a weight lifter is 80 n. c. the amount of upward force of a table on a box is 25 n. d. a box on a rough table has difficulty sliding past 25 n of force.

Option (B) is the correct answer.

Explanation:

means force exerted by gravity. It is defined as, in the universe energy object that has mass will exert a gravitational pull on another object that also has mass.

This pull depends on the masses of objects.

Thus, we can conclude that the weight of a barbell acting on a weight lifter is 80 N best represents .

frequency or wavelenth of em radiation in a vacuum