# How Fast Would Wonder Woman’s Lasso Need to Spin to Block Bullets?

• Length of bullet (using the same bullets) = 1.3 cm to 2.1 cm (I mostly just estimated the length of the 9 mm.
• Lasso diameter = 1 cm (guess).
• Lasso length = 1.5 meters — of course this can change based on how much Wonder Woman choose to spin in her lasso shield.
• What if Wonder Woman wants to change the speed of the spinning lasso in order to perfectly hit a bullet? Let’s say that the lasso is spinning with a lower angular velocity (half of my calculated value). She see’s a bullet fired from a gun that is 10 meters away and it’s going to impact the shield at a location opposite the rope so that it has to travel π radians to block the bullet. What is the angular acceleration for this to happen?
• What is the rotational kinetic energy of this spinning lasso (using my original rotation rate). You can assume the rope has a density the same as nylon — or change this to some value that makes you happy.
• Estimate the power required for Wonder Woman to get this lasso spinning up to shield speed in 5 seconds.
• Imagine that the lasso hits a bullet on the side during it’s rotation. Estimate the angular deflection of the bullet.

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