1) When a box is horizontally pushed across a floor at a
constant velocity, the amount of friction acting on the box is
a) less than the pushing force.
b) equal to the pushing force.
c) greater than the pushing force.
d. dependent on the speed of the sliding box
2) A measure of the amount of inertia is _________________.
3)
A difference between Newton’s law of gravity and Coulomb’s law
is that only one of these
a. is a fundamental physical law.
b. uses a proportionality constant.
c. invokes the inverse-square law.
d. involves repulsive as well as attractive
forces.