Puzzler #1. The Chicken Truck

A truck of live poultry is stopped before a bridge on a country road.  Its driver, beating the side of the truck with a stick, is asked what he is doing and he explains that his load is too heavy for the bridge so he is making the birds fly to lighten his load before proceeding. For this problem imagine that the truck is completely sealed. No air in, no air out. Your question for this week is:  Is the truck lighter?

Concepts involved:

  • weight, gravity, mass

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