Which of the following statements describes the
relationship between the epicenter and focus of
an earthquake?
a. the focus is the point on earth's surface where
the epicenter of an earthquake is located.
b. the epicenter is the point on earth's surface
that lies directly above the focus.
c. the epicenter is the point where an
earthquake occurs, and the focus is where
seismic waves reach earth's surface.
d. the focus is deeper within the earth than the
epicenter is.

Which statements describe how a machine can make work easier? check all that apply. it can put out more force than the input force by decreasing the distance through which force is applied. it can increase the amount of work performed if the output force is in the same direction as the input force. it can apply a force to an object in a different direction than the force applied to the machine. it can increase the distance through which a force acts by exerting less force than was used on it. it can exert a greater force through a greater distance than the force used on the machine.