Kerry drops her iPhone accidentally as she is standing on an overlook. How fast is the iPhone moving after 3 seconds?

A500g object falls off a cliff and losers 100 j from its gravitational potential energy store. if the gravitational field strength g=9.8n/kg, how high is the cliff?

In order for the bug to fly through the air a force has to push the bug forward. identify this force. how does the bug produce

The material that keeps its new shape after it is stretched is called?