Aparticle moves along a line so that its velocity at time t is v(t) = t2 − t − 20 (measured in meters per second).
(a) find the displacement of the particle during 3 ≤ t ≤ 9.
(b) find the distance traveled during this time period. solution (a) by this equation, the displacement is s(9) − s(3) = 9 v(t) dt 3 = 9 (t2 − t − 20) dt 3

(a)

(b) 78 m

Explanation:

Physics' cinematics as rates of change.

Velocity is defined as the rate of change of the displacement. Acceleration is the rate of change of the velocity.

Knowing that

(a) To find the displacement we need to integrate the velocity

(b) The displacement can be found by evaluating the integral

the working equation for the angular size is the product of the physical size and 360 degrees divided by the product of two pi and distance from earth. the minimum size would be 0.559 degrees while the maximum size would be 0.49 degrees. 

where’s the list ? the question is incomplete