A 10-Kilogram Block Is Pushed Across a Horizontal Surface with a Horizontal

Multiple Choice

A 10-kilogram block is pushed across a horizontal surface with a horizontal force of 20 N against a friction force of 10 N. The acceleration of the block is

A) 1 m/s².
B) 2 m/s².
C) 5 m/s².
D) 10 m/s².
E) none of the above