Question

A block connected to a spring oscillates vertically. A damping force $${F_d},$$ acts on the block by the surrounding medium. Given as $${F_d} = - bVb$$ is a positive constant which depends on :

A. viscosity of the medium

B. size of the block

C. shape of the block

D. All of these

Answer : All of these

Solution :
$$F = - bV,b$$ depends on all the three i.e, shape and size of he block and viscosity of the medium.