Question
A particle starts from rest, and its angular displacement (in radians) is given by $\theta = \frac{t^2}{20} + \frac{t}{5}$. If the angular velocity at the end of $t = 4$ is $k$, then the value of $5k$ is?
A particle starts from rest, and its angular displacement (in radians) is given by $\theta = \frac{t^2}{20} + \frac{t}{5}$. If the angular velocity at the end of $t = 4$ is $k$, then the value of $5k$ is?