|
Un article trouvé pour ce sujet.
 |
|
|
|
|
|
|
|
|
A gymnast is swinging on a high bar. |
2007-02-14 |
|
William pose la question :
A gymnast is swinging on a high bar. The distance between his waist (center of mass) and the bar is 1.1 m. If his speed at the top of his swing is zero and his gain in speed is due entirely to his change in gravitational potential energy, find his speed at the bottom of his swing.
Stephen La Rocque lui répond. |
|
|
|
