Recent content by albertnewton

it should have been cos(20+15) not cos(35+15).. stupid error

Yes, v0 has a component in the u_r direction (x component) and in the u_theta direction (y direction). Here's what I did but it is not correct: v0 = (216)(cos(35)) + (-0.022)(sin(35)) = 176.949 obviously this is wrong because the -.022 is in units rad/s and I am not sure how to convert to ft/s...

The radar is between the runway and the plane. So when I convert v0 to dr/dt and dtheta/dt would it look like this: v0=cos(35+15)*dr/dt - cos(90-50)*dtheta/dt v0=cos(50)*(216 ft/s) - cos(40)*(-0.022 rad/s) if so I don't know r so I can't convert rad/s to ft/s in order to simplify?

Homework Statement A plane, B, is approaching a runway along a straight line 15 degrees (angle phi) below horizontal, while the radar antenna, A, is monitoring the distance, r, between A and B, as well as the angle between A and b, theta. The plane has a constant approach speed v0. In...