Question

The relative motion of a bicyclist pedaling 5 km/hour to the north to a person in a car traveling 35 km/hour to the north is ____ km/hour to the ____. a) 30, north b) 40, north c) 30, south d) 40, south

Answer 1

Answer: The relative motion of the bicyclist pedaling 5 km/hour to the north to a person in a car traveling 35 km/hour to the north is:

b) 40 km/hour to the north

The relative motion is calculated by adding the speeds of the two objects if they are moving in the same direction. In this case, both the bicyclist and the person in the car are moving to the north, so you simply add their speeds together: 5 km/hour + 35 km/hour = 40 km/hour to the north.