Which arrow represents the direction of the frictional force acting on the box?

if you answer my question i will answer yours

and 1and 1

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.

f=ma newton

f=100x2.5=250n