Answer:
1)What affects the motion of the block of wood?
=Depends whether the block is sliding on a surface or freely falling. If it is sliding on a surface, it is affected by friction and weight. ... It is affected by its weight (or gravity) and air resistance
2) What kind of friction is shown when you let the
block of wood with sandpaper slide on the surface of
the table?
=Sliding Friction,, also called Dry Frictipn, occurs when two objects rub against each other at slide against each other. Sliding Friction is caused by Chemical bonding between surfaces.
3) What kind of friction is shown when you let the
block of wood roll on rods?
=sliding friction- sliding friction refers to the resistance created by two objects slidingagainst each other.
4) Under what kind of condition was the frictional
=As far as I know, it is under smooth surface
5) How do rollers help in decreasing the amount of
force needed to pull the block of wood?
=Rollers help in decreasing the amount of force needed to pull the block of wood by reducing the resistance of the motion from friction. In this case, the motion is pulling the block of wood, since friction is the force that opposes the motion, the rollers will act as friction reducers.
