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For the motion from her hand to the ground, what is the magnitude of the average velocity of the ring?

Isn't avg velocity = x2-x1/t2-t1? if they don't give you t do you have to figure it out? I did but i still got it wrong. It looks to simple from the calculations I have been making. This is my first physics class and its hard

For the motion from her hand to the ground, what is the magnitude of the average acceleration of the ring?

same with this one

In how many seconds after being thrown does the ring strike the ground?

What is the speed of the ring just before it strikes the ground?

thanks for the help everyone