Of the following statements, indicate on the line whether they are true (T) or false (F): ___ The friction between two surfaces can be changed by changing the masses of the objects. ___ The coefficient of static friction can be less than the coefficient of kinematic friction. ___ When the force of friction increases, the coefficient of friction decreases. ___ The only way to change the friction between two objects is by changing their masses. ___ The only way to change the friction between two objects is to polish their surfaces.
Of the following statements, indicate on the line whether they are true (T) or false (F):
___ The friction between two surfaces can be changed by changing the masses of the objects.
___ The coefficient of static friction can be less than the coefficient of
___ When the
___ The only way to change the friction between two objects is by changing their masses.
___ The only way to change the friction between two objects is to polish their surfaces.
___ The only way to change the friction between two objects is by changing their materials.
___ The value of the friction force of a body is always constant when it is static
and does not vary with the applied force.
___ When a ball strikes outside the center of gravity of a baseball bat, the ball will travel
further than if it hit the center of gravity.
___ The center of gravity of a body may be outside of it.
___ The center of gravity of an object depends only on the geometry and not on the material or
the chemical composition of which it is made.
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