10. Horizontal velocity

A girl of mass 31 \(kg\) jumps with a horizontal velocity of 8 $m{s}^{-1}$ onto a stationary cart with frictionless wheels. The mass of the cart is 5 \(kg\).(Enter the values up to two decimal)

What is her velocity as the cart starts moving? Assume that there is no external unbalanced force working in the horizontal direction.