- #1
ac7597
- 126
- 6
- Homework Statement
- Polly climbs to the top floor of her dorm, a height H=90 meters above the ground. She holds a ball of mass m=2 kg in her hand. She sticks her arm out a window facing East, so that the ball is d=0.77 meters away from the window. Polly then drops the ball.
Ignore air resistance
What is the angular momentum of the ball measured from the window at a time t1=0.7 seconds after Polly drops the ball? Provide both a magnitude and direction.
What is the angular momentum of the ball measured from the window at a time t2=1.8 seconds after Polly drops the ball? Provide both a magnitude and direction.
What is the angular momentum of the ball measured from the window at a time t3=2.4 seconds after Polly drops the ball? Provide both a magnitude and direction.
- Relevant Equations
- angular momentum(L) = (radius) * (mass*velocity)
(L) = (radius) * (mass*velocity)
velocity= 0+ (9.8m/s^2) (0.7s) = 6.86m/s
(L) = (0.77m) * (2kg*6.86m/s)= 1.05 kg*m^2/s
angular momentum points towards Polly
velocity= 0+ (9.8m/s^2) (0.7s) = 6.86m/s
(L) = (0.77m) * (2kg*6.86m/s)= 1.05 kg*m^2/s
angular momentum points towards Polly
