A dart is thrown horizontally with an initial speed of
10 m/s toward point P, the bull’s-eye on a dart board. It hits at
point Q on the rim, vertically below P, 0.19 s later. (a)What is the
distance PQ? (b) How far away from the dart board is the dart
released?

Question

A dart is thrown horizontally with an initial speed of
10 m/s toward point P, the bull’s-eye on a dart board. It hits at
point Q on the rim, vertically below P, 0.19 s later. (a)What is the
distance PQ? (b) How far away from the dart board is the dart
released?

joannablackwelder · Answer

We first need to figure out what all we know in the x and y directions.

joannablackwelder · Answer

What are initial velocity, final velocity, acceleration, time, and displacement in the x direction (you may not know all of them yet).

kaederfds · Answer

could you tell me the step? :D

joannablackwelder · Answer

Well, the x direction is kinda tricky actually. The initial velocity is 10 m/s, the final velocity is 10 m/s (we are assuming no drag), the acceleration is 0, time is 0.19 s, and we don't know the displacement yet.

joannablackwelder · Answer

Does that all make sense so far?

kaederfds · Answer

tell me more

joannablackwelder · Answer

I want to make sure that you know where all of these numbers are coming from before I continue.

joannablackwelder · Answer

Is it all making sense?

kaederfds · Answer

yes :D

joannablackwelder · Answer

Great! :)

joannablackwelder · Answer

You can actually find the answer to letter b with this information alone. Any ideas how?