Friday

July 25, 2014

July 25, 2014

Posted by **Jenny** on Monday, October 1, 2007 at 3:50pm.

v_yo_= +10m/s

v_xo_= +5m/s

a_y_ = -10m/s^2

So I used the formula: y=vo+1/2at^2

I drew the graph, and got a parabala.

Now, my question is, how do I find instantaneous vertical velocity at 6s using the graph?

Do I use the linear question for horizontal motion at all in this problem? x=vo(t)

Any help would be great. THanks

- Physics -
**drwls**, Monday, October 1, 2007 at 5:06pmTo use the graph only, you could either (1) measure the tangent to the y(t) curve at = 6 s, or (with less accuracy):

(2) divide the difference in y altitudes at t = 7 s and t = 5s by the interval, 2 s.

You could also get the exact answer by differentiating the y(t) function itself, to get Vy (t), but they don't seem to want you to do that.

You will not need the horizontal equation of motion to do this problem.

- Physics -
**Jenny**, Monday, October 1, 2007 at 5:14pmAlright, thanks. I drew a tangent line and found the slope at t=6, and got 3.75 m/s as my instantaneous velocity.

Just so I know... when do I have to take into consideration the linear equation governing horizonatal motion?

**Related Questions**

Physics - A person on horseback moves according to the velocity-versus-time ...

physics - A tennis player moves back and forth along the baseline while waiting ...

Physics - The location of a car at times t1 and t2 is given by the position ...

PHYSICS :( - A helicopter is lifting off from the ground and is moving ...

Math - You are in a car of a ferris wheel. The wheel has a radius of 8m and ...

Physics - I am given a velocity versus time graph for a runner. For it, I had to...

Physics - This question has to do with kinematics graphing. I CAN NOT REPRODUCE ...

Physics - I'm having trouble with motion graphs. How do you go from an ...

Physics - I'm shown a graph with position on the y axis and time on the x axis. ...

Math - Could someone please help with this question. State the properties of y...