There would be 2 layers: lithosphere and asthenosphere
Explanation:
They contradict each other because the lithosphere consists of the crust as well as the portion of the upper mantle, which acts as a brittle, rigid solid. the asthenosphere is a partially molten upper mantle material that acts plastically and can flow.
<h3>Or you can think of it as:</h3>
The lithosphere is the brittle crust and uppermost mantle. The asthenosphere is a solid but it can flow, like toothpaste. The lithosphere rests on the asthenosphere.
Newton's 2nd law can be expressed as the rate of change of the total momentum, respect of time, as follows:
So, in order to find the average force exerted by the skater on the wall, we can find the change in momentum due to the force exerted by the wall (which is equal and opposite to the one exerted by the skater), and divide it by the time interval , as follows:
Distance travelled in south direction= 1.5hr*0.75km/hr= 1.125km Distance travlled in north direction= 0.90*2.5=2.25 Net displacement = 2.25-1.125= 1.125 to the north
