Recent content by dougr81

physixguru, I've tried 0.8 m/s as the answer to the velocity of the river and it is incorrect.

Tried it already, incorrect.

A boat takes 2.6 hours to travel 28.43 km down a river, then 5.5 hours to return. How fast is the river flowing? So we want to find the velocity the river has. I'm not sure I even started this right. First I converted 2.6 hours to seconds = 9360 s Then 5.5 hours to seconds = 19800 s...

Hi, I am having some trouble with this simple kinematics problem. Here it is: A skier is gliding along at 2.91 m/s on horizontal, frictionless snow. He suddenly starts down a 22° incline. His speed at the bottom is 12.18 m/s. The first question asks for the length of the incline, which...

Thanks for the explanation you two, it makes sense! I thought a dimensionally correct eqn had to be correct but I now see why that's not true. Thanks again!

I understand the concept of dimensional analysis and what it's used for etc..My question refers to a dimensionally correct or incorrect equation being true or false. Here are the possiblities: 1. A dimensionally correct equation may be correct. 2. A dimensionally incorrect equation may be...