## Engineering Mechanics: Statics & Dynamics (14th Edition)

$F=m^{\prime}v^2$
We can determine the required force as follows: $\Sigma F_s=m\frac{dv}{dt}+\frac{dm_i}{dt}v_{D/i}$ As the car moves with constant speed, $\frac{dv}{dt}=0$ $\implies F=(m_{\circ}-m^{\prime}v)(0)+v(m^{\prime}v)$ This simplifies to: $F=m^{\prime}v^2$