Tuesday
March 31, 2015

Homework Help: physics

Posted by Mischa on Tuesday, March 20, 2007 at 7:50pm.

A bird perched on a swing the sits 8 cm below a bar has a mass of 52 g, and the base of the swing has a mass of 153 g. The swing and bird are originally at rest, and then the bird takes of horizontally at 2 m/s. How high will the base of the swing rise above its original level (disregard friction)?

Use conservation of momentum:

massbird(vbird)=massswing*velswing

then, having the velocit of swing, determine its KEnergy. That kE will equal gravitational PE, or mgh.

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Physics - The bird perched on the swing shown below has a mass of 42.7 g, and ...
Physics Pendulum - 1. Many pendulums used in clocks are made of a thin metal ...
physics - Two parakeets sit on a swing with their combined center of mass 15.0 ...
Physics - A gymnist is swinging on a high bar. The distance between his waist ...
physics - A swing sits 5 m above the ground when it is still. John lifts the ...
physics - A gymnast is swinging on a high bar. The distance between his waist ...
AP PHYSICS - A gymnist is swinging on a high bar. The distance between his waist...
Music - Isn't "In a Mellotone" an example of big band swing or small group swing...
ph - A gymnast is swinging on a high bar. The distance between his waist and ...
Physics 1 - Monique has a mass of 46 kg and she is sitting on a swing that hangs...

Members