Question

A plate moves 2 km over a million years. A quarter of the way through this million-year timespan (at 250,000 years), the velocity was 5 mm/year.
Required:
What is the instantaneous velocity at 250,000 years and the finite velocity for the entire million-year timespan?

Answer 1

The instantaneous velocity of the plate at 250,000 years is 5 mm/year.

The finite velocity of the plate for the entire million-year timespan is 2 mm/year.

Instantaneous velocity

The instantaneous velocity is the rate of change of displacement   with time. It measures the velocity at a specific period of time.

The instantaneous velocity of the plate at 250,000 years is 5 mm/year.

Finite velocity

The finite velocity of the plate for the entire million-year timespan is calculated as follows;

$v = \frac{2 \ km}{1 \times 10^6 \ year} = \frac{2 \times 10^6 \ mm}{1 \times 10^6 \ year} = 2 \ mm/year$

Learn more about instantaneous velocity here: brainly.com/question/2234298