Friday, February 10, 2017

Homework assignment 2/10/17


Today's 2/10/17 homework is to solve the following problems:

 1. Mr. Abrams is racing a Ferrari in his beat up 2002 gold Buick Century. He starts out at a speed of 40 meters per second and then accelerates to a speed of 50 meters per second. He speeds up over a distance of 200 meters. What is his acceleration?

 2. Wile e Coyote jumped off a 220 meter cliff chasing after the roadrunner. After falling, his final velocity just before hitting the ground is 380 m/s. At what speed did he jump off the cliff?

 3. Mr. Mittens the cheetah is locked onto an unfortunate antelope which he wishes to consume. Mr. Mittens starts out at a velocity of 25 meters per second and accelerates at a rate of 0.5 m/s^2. What is the final velocity of Mr. Mittens if he sinks his fangs into the antelope 500 meters away from his starting point?

Use P.U.K.E.S. to solve these problems and create a list of variables for each of the problems. We did this in class today. 

 DUE IN CLASS ON MONDAY 2/13
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5 comments:

  1. Sophie Crozier-CaroleFebruary 11, 2017 at 11:37 AM

    I am confused on how to do number one and three

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    Replies
    1. UnknownFebruary 11, 2017 at 12:02 PM

      For number 1, the car starts at 40m/s, after driving for 200 meters, the car's velocity is now 50m/s. You can use the new equation you have learned in class to solve for the acceleration. he point is since the object is not falling, the acceleration is not 9.8 m/s^2. This is the same for problem 3, but instead you are given the acceleration of the cheetah and you must solve for the final velocity. The cheetah starts at 25 m/s (it is already moving) and gets to the antelope 500 meter away from where it started. You need to solve for the velocity of the cheetah after it has traveled the 500 meters. Get the variable you want by itself, and solve for it.

      Delete
    2. UnknownFebruary 11, 2017 at 1:22 PM

      The equation was V^2 = Vo^2 + 2a(Pf-Po)

      ^2 means that the value is squared and Pf-Po is the change in position.

      I can't put the delta symbol for the change in position here

      Delete
  2. Sophie Crozier-CaroleFebruary 12, 2017 at 4:36 PM

    And for number 2 would we do that same by re-arranging what we are looking for

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