A 49kg skier leaves the end of a ski-jump ramp with a velocity of 28 m/s directed 22o above the horizantal. Suppose that as a result of air drag the skier returns to the ground with a speed of 17 m/s, landing 10 meters vertically below the ramp. From the launch to the return to the ground, by...
free fall with drag force
If the equation F=-bv^2 describes the drag force of an object...then the differential equation for the object's motion would be:
dv/dt= -g+bv/m
or is it...
dv/dt= g-bv/m
After solving the equation, should I get...
V=mg/b[1-e^(-bt/m)]
Also, does this...
If a vehicle could continuously cool the air in front of it and heat the air behind it, the air in front should contract and the air behind expand, reducing the pressure in front of the vehilce and increasing it behind the vehicle. This should pull the vehicle into the cooler air at the front...
a crate falls from an airplane flying horizontally at an altitude of 2,000 m. neglecting air drag, howlong will the crate take to strike the ground/ is the formula t = d/v help
Since my other thread is lacking attention, perhaps it is more suitable here:
I inserted some fixed constants and multiplied out
(48/.5)(1-^e-.5t)(sin 45) + (9.8/.25)(1-(.5t) - e^-.5t) = 0
(96 - 96e^-.5t)(sin 45) + 39.2(1-(.5t)-e^-.5t) = 0
67.88 - 67.88^e-.5t + 39.2 - 19.6t -...