# Physics

posted by .

A raindrop of mass 61.60 mg (that is milli- gram) falls in quiet air (no wind). Due to the air resistance force, the drop has a maximum velocity called the terminal velocity of magnitude, 11.00 m/s, which is reached high above ground. What would be in N the weight of the rain drop after it reaches terminal velocity and before it reaches ground? Use g = 10 m/s2 and take the upward direction as positive.

• Physics -

You use of the term weight is confusing to me. THe raindrop if falling through the air. If by weight, you mean the force the air is pushing against the drop, and thereby the Earth is pushing against the raindrop, then the answer is at constant velocity mass*g

Frankly, your use of Weight her bothers me, as it is being likely used in some specific problem writers thought.

Consider. You stand on a scale and weigh 110 lbs. You get into an airplane, and jump out. Whether or not you are at constant velocity, the Earth is pulling you with a force of 110lbs. If air is resisting that motion, the acceleration decreases, but the Earth is still pulling on you with 110 lbs. Gravity does not change. If at constant velocity, then air is pushing on you at 110lbs, but the air is also pushing on the Earth by 110 lbs, so net force is still zero between Earth, you, and the air.

## Similar Questions

1. ### Physics (thx drwls, bobpursley)

After reaching terminal velocity, a raindrop of m=3.06E-4kg falls vertically down a distance of 500m. a)what is the work done by the force of gravity on the raindrop?
2. ### College Physics

A paratrooper w/ a fully loaded pack has a mass of 120kg. The force due to air resistance on him when falling w/ an unopened parachute has magnitude F(sub)d = bv^2, where b=0.14 N*s/m^2. a) if he is falling w/ an unopened parachute …
3. ### Physics

I've tried a bunch, have no idea. Got the first part, no idea on the second one. A basketball, of mass m = 0.45 kg is dropped, from rest, from a stationary hellicopter at a high altitude. Use g = 9.81 N/kg. (a) If air resistance is …
4. ### Physics

A raindrop of mass 57.40 mg (that is milli- gram) falls in quiet air (no wind). Due to the air resistance force, the drop has a maximum velocity called the terminal velocity of magnitude, 17.50 m/s, which is reached high above ground. …
5. ### physics

A 60 kg skydiver moving at terminal speed falls 50 m in 1 sec. What power is the skydiver expending on the air?
6. ### physics

Consider a body falling through the air. The force due to air resistance is given by, F(air)=CAv^2, where C is the coefficient of air friction, A is the area facing the direction of the motion, and V is the velocity of the object with …
7. ### physics/math

A spherical raindrop of mass 0.0108 g and radius 1.37 mm falls from a cloud that is at a height of 1165 m above the ground. Assume the drag coefficient for the raindrop is 0.60 and the density of the air is 1.3 kg/m3. What is the raindrop's …
8. ### Physics

We release an oil drop of radius r in air. The density of the oil is 640 kg/m . c_1 and c_2 for 1 atmosphere air at 20 C are 2.20* 10 ^-4 (kg/m)/sec and 0.81 kg/m , respectively. How small should the oil drop be so that the drag force …
9. ### physics

We release an oil drop of radius r in air. The density of the oil is 640 kg/m3. C1 and C2 for 1 atmosphere air at 20∘ C are 3.90 × 10−4 (kg/m)/sec and 0.73 kg/m3, respectively. How small should the oil drop be so that …
10. ### physics

We release an oil drop of radius r in air. The density of the oil is 640 kg/m3. C1 and C2 for 1 atmosphere air at 20∘ C are 3.90 × 10−4 (kg/m)/sec and 0.73 kg/m3, respectively. How small should the oil drop be so that …

More Similar Questions