posted by .

For a question in physics... I was told to draw a graph of vertical displacement, y, versus time, t, in 2sec increments from 0 to 1.8. What was given to me was:

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 -

    To 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 -

    Alright, 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?

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Physics

    I am given a velocity versus time graph for a runner. For it, I had to figure out the average velocity for the entire 16 s interval (for this, I got 2 m/s). Now they want me to find the displacement of the runner in the first 15.4 …
  2. Physics

    A person on horseback moves according to the velocity-versus-time graph shown in Figure 2-32. (The vertical axis is marked in increments of 1 m/s and the horizontal axis is marked in increments of 7 s.) Find the displacement of the …
  3. Physics

    The location of a car at times t1 and t2 is given by the position vectors r1= 15km due east + 20km due north (time t1) and r2= 13km due west + 25km due north (time t2) The units of distance are kilometers a. What is the magnitude l^rl …
  4. PHYSICS :(

    A helicopter is lifting off from the ground and is moving vertically upward. The graph shows its vertical velocity vy versus time. How high is the helicopter after 8 s have elapsed?
  5. physics

    A tennis player moves back and forth along the baseline while waiting for her opponent to serve, producing the position-versus-time graph shown in the figure. (The vertical axis is marked in increments of 1 m and the horizontal axis …
  6. Math

    You are in a car of a ferris wheel. The wheel has a radius of 8m and turns counterclockwise. Let the orgin be at the center of the wheel. Begin each sketch in parts a) and b) when the radius from the centre of the wheel to your car …
  7. Physics

    This question has to do with kinematics graphing. I CAN NOT REPRODUCE THE GRAPH BUT hope that some help can be given to me with this question. The position versus time for a certain object moving along the x-axis. The object's initial …
  8. Physics

    A renegade watermelon starts at x = 0 m and rolls at a constant velocity to x = −3.0 m at time t = 5.0 seconds. Then, it bumps into a wall and stops. Draw its position versus time graph from t = 0 s to t = 10 s.
  9. Physics

    An object travels with a constant acceleration for 10 s. The vectors in Figure 3-41 represent the final and initial velocities. carefully graph the x component of the velocity versus time and the y component of the acceleration versus …
  10. Physics

    Draw areal velocity versus time graph for Mars.

More Similar Questions