These are “plug-in-the-number” type activities to familiarize yon with the equations that link the concepts of physics. They are mainly one-step substitutions and are less challenging than the Problem. ? Calculate the average speed (in km/h) of Larry, who runs to the store 4 kilometers away in 30 minutes. ?
Here the person runs to the store 4 km away in 30 minutes. 30 min =½ hr Average speed is the ratio of distance travelled by the car divided by elapsed time v = d/t v = 4 km/(1/2 hr) v = 8 km/hr Distance is defined as avg speed multiplied by time d = v t * d = (8 km/hr) * (1 km/hr) d = 8 km