Velocity/speed

If they asked me to find the velocity at point C, would I have to consider both horizontal and velocity and take the root of the sum of their squares ?

Also, if they asked me to find?the speed at point C, would it be correct if I just found the vertical velocity at this point? a

(edited 11 years ago)

Bump

Original post by GPODT

If they asked me to find the velocity at point C, would I have to consider both horizontal and velocity and take the root of the sum of their squares ?

No. Velocity is a vector so you have to find both its magnitude and its direction. The calculation that you gave above finds the magnitude; you can give its direction in a variety of ways, but here you would probably specify the angle that the velocity vector makes with the horizontal.

So you could say, for example, that the velocity is 8 m/s at an angle of -50 degrees to the horizontal.

Or you could set up x-y coords, and give the velocity vector as components parallel to those axes e.g. as

\begin{pmatrix} 5 \\ -8\end{pmatrix}

5\bold{i}-8\bold{j}

(or whatever the components are).

Also, if they asked me to find?the speed at point C, would it be correct if I just found the vertical velocity at this point? a

No. You'd just give the magnitude of the velocity vector, according to the calculation that you made above.

Quick Reply

Latest

Articles for you

What is an LLM and how could it benefit your career?

Powerful questions business students forget to ask their career advisers

Why I chose a law degree and what studying law was like

What can you do with an arts degree?

Velocity/speed

Quick Reply

Related discussions

Latest

Trending

Trending

Articles for you