15. a 100-kg man hits a punching bag with a net force of 2,000 n, as his hand accelerates from 0 m/s to 20 m/s in 1 s. with how much force does the punching bag hit the man?

b) returns freshwater to the earth.

c) returns freshwater to the earth.c) occurs after condensation.

d) returns freshwater to the earth.c) occurs after condensation.d) roughly equal to the amount of evaporation.

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i think the answer would be b

a displacement distance is size of displ

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.