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A comment on Inside Google’s Drone-Delivery Program. Parent comment

Re:Inside Google’s Drone-Delivery Program by hnriot on Friday August 29, 2014 @01:09AM (#8241225)
instead they get hit on the head.
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Re:Inside Google’s Drone-Delivery Program by ynniv on Friday August 29, 2014 @01:30AM (#8241276)
... by something lowered on a tether. If you think that's comparable to touching a rotor, you don't know much about rotors. mv^2!
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Re:Inside Google’s Drone-Delivery Program by hnriot on Monday September 01, 2014 @06:02PM (#8254858)
touching a rotor chops your hand off. Getting hit in the head by delivery of dog food kills you. It's kinetic vs potential energy. for your kinetic energy equation you need a lot of speed and a lot of mass. You can have one of those, but not both.
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