At a construction site a small crane is raising two boxes with weights a s 20 kg and 10 kilograms respectively. if the coefficient of kinetic friction is 0.3 how fast will the boxes accelerate along the plank, once they start to slide?

wire in brush may conduct electricity from cell to drill and vice versa electrc shock possible

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.

causes

fossil fuels burn

cities become more industrialized

human population grows worldwide

the rearrangement of particles in a physical change. hope this