Question

A motorist drives north for 36.0 minutes at 65.5 km/h and then stops for 15.0 minutes. He then continues north, traveling 130 km in 2.30 h.(a) What is his total displacement?_____ km(b) What is his average velocity?_____ km/h

Answer 1

$\begin{gathered} Displacement=(65.5km/h\cdot36min\cdot\frac{1h}{60min})+130km \\ Displacement=39.3km+130km=169.3km \end{gathered}$$\begin{gathered} Velocity=\frac{169.3km}{36min+15min+2.3h\cdot\frac{60min}{1h}} \\ Velocity=0.8958km/min=53.75km/h \end{gathered}$