Question

A body of mass m=10-2 kg is moving in a medium and experiences a frictional force F = -K V2. Its initial speed is V0=10ms-1. If, after 10 s, its energy is 1/8 mv20, the value of k will be

A) 10-3 Kg m-1

B) 10-3 Kg s-1

C) 10-4 Kg m-1

D) 10-1 Kg m-1 s-1

Answer 1

Answer:

answer is b) 10-3kg s-1