Posted by **Cavin** on Tuesday, February 27, 2007 at 9:03am.

A gymnist is swinging on a high bar. The distance between his waist and the bar is 1.1M. At the top of the swing his speed is momentarily zero. ignoring friction and treating the gymnist as if all his mass is located at his waist, find his speed at the bottom of the swing.

At the bottom of his swing, he has lost gravitational potential energy

PE = 2 M g * 1.1 m

If all his mass were at his waist, the velocity of the waist would be given by

KE = (1/2)M V^2 = 2 M g * 1.1 m,

because the potential energy loss would be cnverted to kinetic energy.

Cancel out the unknown M and solve for V.

V = sqrt (4*g*1.1 m)

## Answer This Question

## Related Questions

- AP PHYSICS - A gymnist is swinging on a high bar. The distance between his waist...
- physics - A gymnast is swinging on a high bar. The distance between his waist ...
- ph - A gymnast is swinging on a high bar. The distance between his waist and ...
- physics - a uniform bar of mass is supported by support pivoted at top about ...
- physics - if theta is the angle between unit vectors A bar and B bar, then (1-A ...
- Physics Classical Mechanics - A bar of mass m and negligible height is lying ...
- Physics - A glass is slid across a bar top and eventually comes to rest. if the ...
- classical mechanics - A bar of mass and negligible height is lying horizontally...
- physics - Hello everyone, I need help with this question: A bartender slides a ...
- PHYSICS - There's a bar with length of 6.49m and mass of 5.45kg leaning against ...

More Related Questions