Circular Motion Video Lessons

Concept

# Problem: The Nardo ring is a circular test track for cars. It has a circumference of 12.5km. Cars travel around the track at a constant speed of 100km/h. A car starts at the easternmost point of the ring and drives for 15 minutes at this speed.(a) What distance, in km, does the car travel?(b) What is the magnitude of the car's displacement, in km, from its initial position?(c) What is the speed of the car in m/s?

###### FREE Expert Solution

(a)

Speed  = 100 km/h

time = 15 min (1 hr/60 min) = 0.25 hrs

Distance = speed × time = 100 × 0.25 = 25 km

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###### Problem Details

The Nardo ring is a circular test track for cars. It has a circumference of 12.5km. Cars travel around the track at a constant speed of 100km/h. A car starts at the easternmost point of the ring and drives for 15 minutes at this speed.
(a) What distance, in km, does the car travel?
(b) What is the magnitude of the car's displacement, in km, from its initial position?
(c) What is the speed of the car in m/s?