Explain frictional, viscous and drag forces, including air resistance, and their effects on motion.
A box in air slides with increasing speed down a rough slope from point P to point Q.
The slope surface exerts a constant frictional force on the box.
As the box moves from P to Q, there are changes to the magnitudes of its acceleration and the total resistive force acting on it.
Which row describes the changes?
magnitude of
acceleration
magnitude of
total resistive
force
increases
decreases
decreases
decreases
increases
increases
decreases
increases