question_answer

A stone of 1 kg is thrown with a velocity of \[20\text{ }m/s\]across the frozen surface of a lake and comes to rest after travelling a distance of 50 m. What is the force of friction between the stone and the ice?

A) \[-\,4\,N\]

B) \[+\,4\,N\]

C) \[-\,2\,N\]

D) \[+\,2\,N\]

E) None of these