Recent content by sarmar

Thank you!

Well because I'm still not getting the right answer...

I am not given any information for drag coefficient. So I suppose I was assuming 1. I found online the drag coefficient of a spherical object is approx. 0.5 I thought the diameter was the same as the cross-section. Area of a circle? A=p*r^2 =pi*0.0000035^2...

Homework Statement Calculate the terminal velocity for a pollen grain falling through the air using the drag force equation. Assume the pollen grain has a diameter of 7 µm and a density of 0.3 g/cm3. Homework Equations Vterm= sq.rt of 2mg/pA Volume= 4/3pi*r^2 Density = m/v The...

This following example is why I originally thought the answer -14.6N, was 14.6N[upward]: A 50.0kg girl falls 3.0m from a loft into a pile of hay. She is brought to rest by the hay in a distance of 1.0m. What is the average force exerted by the hay? Answer: Is broken up into first part of the...

There is no question or example in my book that shows F(up) - mg = ma F = ma + mg Only examples using FN=ma-Fg are used. For example: Carla carries a spring balance with her on a fishing trip. She catches a fish, weighs it on the scale and gets a reading of 5.0N In the elevator Carla notices...

Thank you :) that does make sense. It's just that my course book shows: Fnet=Fg+FN ma=Fg+FN FN=ma-Fg and so that's what I've been following. Could you possibly explain it expressed in this way?

Homework Statement a) Cathy takes the bus home from work. In her hand she holds a 2.0kg cake box, tied together with a string. As she ascends the steps into the bus, the box accelerates upward at a rate of 2.5 m/s^2. What is the force exerted on the string? Homework Equations F=ma...