Recent content by KaseyK

  1. K

    To avoid a collision what is your reaction time?

    I wanted to avoid the car so the acceleration should have been negative?
  2. K

    To avoid a collision what is your reaction time?

    Homework Statement As you are driving with a velocity of 75 km/h [N], you suddenly realize that there is a stalled vehicle in your lane 48.0m directly ahead. You react, applying the brakes to provide an acceleration of 4.80 m/s^2 [S]. If you managed to avoid a collision what was your...
  3. K

    Vertical Jump Analysis: Calculating Time and Take-Off Speed

    No I don't need to solve it using kinematics. I can use any way I want, I just can't figure either way out...ugh.
  4. K

    Vertical Jump Analysis: Calculating Time and Take-Off Speed

    Okay did I at least use the right kinematic equation? Is there anything else you can hint to, to send me in the right direction? Thanks
  5. K

    Vertical Jump Analysis: Calculating Time and Take-Off Speed

    Homework Statement A certain volleyball player can jump to a vertical height of 85 cm while spiking the volleyball. Homework Equations (a) How long is the player in the air for? (b) What is the player's vertical take-off speed? The Attempt at a Solution Firstly I converted 85...
  6. K

    Average Speed - isn't this average velocity?

    Thank you very much. That is so much more clearer. I did have an additional question if you don't mind. The (b) part asks me to calculate the final position of the ball. The answer is 0.32m [N]. I was trying to use one of the various kinematic equations however I feel like I'm missing...
  7. K

    Average Speed - isn't this average velocity?

    A billiard ball travels 0.44m [S] from its original position, bounces off another ball and travels 0.88m [N], then bounces off the edge of the billiard table coming to rest 0.12m from that edge. The entire motion is one-dimentional and takes 2.4s. (a) calculate the average speed of the ball...
  8. K

    How Do You Calculate the Final Velocity of a Skydiver?

    This question was actually a 3 part question. I answered (a) and (b) correctly however I can't figure out how to calculate the 'final velocity of the skydiver'. Here are the givens: x axis v1 - 90 m/s acceleration - zero delta t - 10.6 seconds delta d - 958.5 m Y axis v1 = 0 delta t...
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