Tuesday
September 30, 2014

Homework Help: PHYSICS HELP

Posted by Taylor on Thursday, November 4, 2010 at 8:53pm.

The maximum lift force on a bat is proportional to the square of its flying speed v. For the hoary bat (Lasiurus cinereus), the magnitude of the lift force is given by
FL (0.021 Ns2/m2)v2
The bat can fly in a horizontal circle by "banking" its wings at an angle , as shown in the figure below. In this situation, the magnitude of the vertical component of the lift force must equal the bat's weight. The horizontal component of the force provides the centripetal acceleration.

(a) What is the minimum speed that the bat can have if its mass is 0.037 kg?

(b) If the maximum speed of the bat is 11 m/s, what is the maximum banking angle that allows the bat to stay in a horizontal plane?


(c) What is the radius of the circle of its flight when the bat flies at its maximum speed?



then i was given,
lift*cosTheta=mg
lift*sinTheta=mv^2/r


on the first equation
.021v^2*cosTheta=mg
you know m, g, and v^2, solve for Theta

Then on the second, solve for r.


****BUT i don't know how i already know v^2?????

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Physics - The maximum lift force on a bat is proportional to the square of its ...
Physics - The maximum lift force on a bat is proportional to the square of its ...
physics - A baseball (m = 148 g) approaches a bat horizontally at a speed of 43....
physics - a flying bat emits squeaks of frequency 80 kHz.if a stationary ...
Physics - A baseball (m = 135 g) approaches a bat horizontally at a speed of 40....
physics - A baseball (m = 135 g) approaches a bat horizontally at a speed of 40....
physics - A baseball (m = 151 g) approaches a bat horizontally at a speed of 39....
physics - a baseball (m = 153 g) approaches a bat horizontally at a speed of 41....
physics - A 0.01-kg baseball traveling in a horizontal direction with a speed of...
Physics - Babe Ruth steps to the plate and casually points to left center field ...

Search
Members