A small 0.300 k g bird is flying horizontally at 3.50 m / s toward a 0.750 k g t
ID: 2240375 • Letter: A
Question
A small 0.300kg bird is flying horizontally at 3.50m/stoward a 0.750kg thin bar hanging vertically from a hook at its upper end, as shown in the figure below
A small 0.300kg bird is flying horizontally at 3.50m/stoward a 0.750kg thin bar hanging vertically from a hook at its upper end, as shown in the figure below When the bird is far from the bar, what are the magnitude and direction (clockwise or counterclockwise) of its angular momentum about a horizontal axis perpendicular to the plane of the figure and passing through each point A,B, and C? When the bird is just ready to hit the bar, but is still flying horizontally, what are the magnitude and direction (clockwise or counterclockwise) of its angular momentum about a horizontal axis perpendicular to the plane of the figure and passing through each point A, B, and C?Explanation / Answer
A) The angular momentum is the linear momentum times the normal (perpendicular) distance to the line of motion: Linear momentum = 0.300*3.50; the distance to A = 1.50 m; angular momentum = 1.58 kg*m