Recent content by ScienceGirl502

is there a basic formula for calculating tension? like the tension in a cable or string holding up a sign, etc.

thank you!

i think i solved for terminal velocity with the equation that tide gave me. the first question should be solved by Fdrag = -1/2 CpAv^2 to get the air drag. right?

this is really confusing...the 1st question was "for each size hailstone, calculate the wind speed needed to keep a hailstone of that size aloft...hint--your calculations will involve the weight of the hailstone and the upward force of wind on the hailstone." and then a few questions later it...

would that answer be the wind speed of the terminal velocity of the hailstone? thanks!

thank you SOOOOOOOOOO much!

i'd say that it would be like a car going from 0-? mph, etc. intial velocity is 0 but since the car is accelerating it will continue to accelerate...

i have an answer D = 1.40 the units that don't cancel out are gram/sec is my answer for D D = 1.40 grams/second? i can't find a unit for D anywhere...is this acceptable?

i'd say if the acceleration is not zero that the object will continue to accelerate accroding to Newton's laws...

does it say anything about external forces?

it seems like the object just started at rest...

we were given a hint: your calculations will involve the weight of the hailstone and the upward force of wind on the hailstone.

i have calculated volume and weight from different size hailstones. i now have to calculate the wind speed needed to keep a hailstone of each size aloft. i am stuck on which equation to use... should i solve using D = 1/2(C*rho*A*v^2) ? for rho do i plug in the density of air or of each...