PLEASE HELP!
A typical parachute jump involves individuals exiting an aircraft anywhere from
1 000 to 4 000 metres altitude. When the parachute opens (usually fully inflated
by 800 metres), the descent of the jumper decreases from a terminal velocity of
approximately 190 kilometres per hour to approximately 30 kilometres per hour.

Question

PLEASE HELP!
A typical parachute jump involves individuals exiting an aircraft anywhere from
1 000 to 4 000 metres altitude. When the parachute opens (usually fully inflated
by 800 metres), the descent of the jumper decreases from a terminal velocity of
approximately 190 kilometres per hour to approximately 30 kilometres per hour.

baldymcgee6 · Answer

Sam is watching his friend Elli descend during a jump. With the toggles on her
parachute, Elli is controlling a portion of her descent such that she approaches
the landing zone vertically. Sam is 40 m from the landing zone. Determine the
rate, in radians per second, at which the angle of elevation from Sam to Elli is
decreasing when Elli is 30 m above the landing zone.

baldymcgee6 · Answer

This is a rate of change calculus problem

baldymcgee6 · Answer

I have set up a right angle triangle, with the vertical leg of 30km and the horx leg of 40km, while the vertical leg decreases at a rate of 25/3 m/s