MEE360: angular momentum review

The cross product of position and momentum

• Moment

• Angular momentum

• Torque

• Shear

The angular momentum about C due to v_A is

• Clockwise

• Counterclockwise

The angular momentum about B due to v_A is

• Clockwise

• Counterclockwise

The perpendicular distance from C to v_A is

• 3 ft

• Pick the other answer

H=r x mv. If the mass falling at A is 10 slugs and the velocity v_A is 2 ft/s, the angular momentum about C due to v_A is

• -60 slug ft²/s

• 60 slug ft²/s

• 20 slug ft²/s

• -20 slug ft²/s

The x-component of v_B is

• v_B sin (10)

• v_B cos (10)

• -v_B sin (10)

• -v_B cos (10)

H=r x mv. If the mass falling at B is 10 slugs, the angular momentum about C due to the x-component of v_B is

• -12 ft * 10 slugs* v_B cos (10)

• 12 ft * 10 slugs* v_B cos (10)

• 6 ft * 10 slugs* v_B cos (10)

• 6 ft * 10 slugs* v_B sin (10)

H=r x mv. If the mass falling at B is 10 slugs, the angular momentum about C due to the y-component of v_B is

• -12 ft * 10 slugs* v_B sin (10)

• 12 ft * 10 slugs* v_B cos (10)

• 6 ft * 10 slugs* v_B cos (10)

• 6 ft * 10 slugs* v_B sin (10)

What direction does gravity act?

• Uhm....down?

• Reasonably certain it's upwards

• Sideways, for sure

• Not enough information

• angular velocity

• angular acceleration

• angular position

• angular momentum