A small steel sphere of mass $m$ is falling vertically through a viscous liquid with a constant speed $v$ . Which row in the table correctly describes the changes with time in the kinetic energy and gravitational potential energy of the sphere?
Kinetic Energy || Gravitational Potential Energy
A small steel sphere of mass $m$ is falling vertically through a viscous liquid with a constant speed $v$ . Which row in the table correctly describes the changes with time in the kinetic energy and gravitational potential energy of the sphere?
Kinetic Energy || Gravitational Potential Energy
- A
constant and equal to $\frac{1}{2}\ mv^2$ || decreases at a rate of $mgv$
- B
constant and equal $\frac{1}{2}\ mv^2$ || decreases at a rate of $(mgv\ -½\ mv^2)$
- C
increases at a rate of $mgv$ || decreases at a rate of $mgv$
- D
increases at a rate of $mgv$ || decreases at a rate of ($\frac{1}{2}\ mv^2$ -mgv)
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