Multiple Choice
A block of wood is pulled by a horizontal string across a rough surface at a constant velocity with a force of 20 N.The coefficient of kinetic friction between the surfaces is 0.3.The force of friction is
A) impossible to determine without knowing the mass of the block.
B) impossible to determine without knowing the speed of the block.
C) 0.3 N
D) 6 N
E) 20 N
Correct Answer:

Verified
Correct Answer:
Verified
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