A man of mass $80\; kg$ is riding on a small cart of mass $40\; kg$ moving with velocity $2m/s$ . He is running on the cart, so that his velocity relative to the cart is $3 m/s$ in the direction opposite to the motion of the cart. What is the speed of center of mass of the system.

Question

$$\begin {array} {1 1} (a)\;1.5\;m/s & \quad (b)\;1\;m/s \\ (c)\;3\;m/s & \quad  (d)\;zero \end {array}$$

Comments

thanks a lot