Please help me answer questions (a and b) relating physics.

Question

- Speed by itself does not produce thrills. Living on Earth, you already have a big speed, since Earth is constantly turning.

a) Earth makes a complete revolution once every 24 h. La Paz, Bolivia is close to the Equator and travels a large circumstance in 24 h. Oslo, Norway is close to the Arctic Circle and travels a smaller circumference in 24 h. Which city has the greater speed?

b) The circumference of Earth’s Equator s 40,000 km. It requires one day or 24 h to complete one revolution. Calculate the speed you are traveling on Earth if you are at the Equator.

c) Why do you not get a big trill going at such a high speed?

Answer: There is no change in velocity or direction, because it is a constant speed that everyone is traveling at.

 

Please explain and show work using physics terms, it would be highly appreciated for your help.

Answer 1

(a)  La Paz has a larger circumference (or distance) to cover in 24 hours than Oslo.  Therefore, La Paz has greater speed because speed = distance/time and they both have the same time 24 hours.

(b) Even if you are standstill, you are moving along with the Earth.  The Earth's speed is your speed = 4*10⁴ / 24 = 1,667 km/hr.

(c)  It is Newton's First Law: when an object is traveling at constant speed, there is no net external force acting on the object.  If there is no net external force pushing on you, you should be still standing on the Earth not feeling any trill.