Wednesday

April 1, 2015

April 1, 2015

Posted by **mary** on Wednesday, September 26, 2012 at 10:50pm.

At low altitudes, the altitude of a parachute and time in the air are linearly related. A jump at 2,880 ft use the US army T-10 parachute system last 120 sec.

(A) find a linear model relating altitude a (in feet) and time in the air t (in seconds)

(B) the rate of descent is the speed at which the jumper falls. What is the rate of descent for a T-10 system?

- algebra -
**Steve**, Thursday, September 27, 2012 at 11:03amif time at altitude x is y, then

y = ax+b

Now, b=0, since a jump from 0 feet takes 0 time. So,

y = ax

120 = 2880a

a = 120/2880 = 12/288 = 1/24

y = x/24

the speed is thus ft/s = x/y = 24 ft/s

- algebra -
**mary**, Thursday, September 27, 2012 at 9:13pmThank you

**Answer this Question**

**Related Questions**

physics - Estimate the speed of the parachutist descending at the constant ...

Science - Which of the following explains why a parachute makes a person falling...

physics - A skydiver, who weighs 650 N, is falling at a constant speed with his ...

Physics - A skydiver, who weighs 650 N, is falling at a constant speed with his ...

physics - Estimate the speed of the parachutist descending at the constant ...

Physics - A parachutist relies on air resistance (mainly on her parachute) to ...

physics - An 82.0 kg skydiver jumps out of a balloon at an altitude of 1 500 m ...

physics - An 82.0 kg skydiver jumps out of a balloon at an altitude of 1 500 m ...

physics - An 82.0 kg skydiver jumps out of a balloon at an altitude of 1 500 m ...

college physics - An 82.0 kg skydiver jumps out of a balloon at an altitude of 1...