Elena pulls a sled with her younger brother and sister across the snow covered yard. Then she pulls the same sled across a smooth patch of ice on the sidewalk. Why does Elena find it easier to pull the sled on the ice than on the snow?
Question 7 options:
A)
The box experiences less normal force on the ice.
B)
The box experiences less friction on the ice.
C)
The box experiences more applied force on the ice.
D)
The box experiences more friction on the ice.
