Physics

Hi,
I honestly don't know how to approach this question and what equation to use.

A 50.0 g Super Ball traveling at 28.0 m/s bounces off a brick wall and rebounds at 18.0 m/s. A high-speed camera records this event. If the ball is in contact with the wall for 3.50 ms, what is the magnitude of the average acceleration of the ball during this time interval? (Note: 1 ms = 10-3 s.)

Can anyone help me? What equation would I use and would I use -g or a +g?

Thanks in advance.

  1. 👍 0
  2. 👎 0
  3. 👁 95
asked by Gina
  1. accelerlation is change of velocity/time
    = (vf-vi)/time

    Now for the details. Let the direction of vi be positive, so vf is negative.
    = (-18-28)/time watch the units of time.

  2. Force = rate of change of momentum
    = (momentum out - momentum in)/time
    momentum out = -50*10^-3*18 kg m/s
    momentum in = +50*10^-3*28
    momentum out - momentum in = -50*10^-3*46
    Force = -50*10^-3*46/3.5*10^-3 s
    acceleration = Force/mass = -46/3.5*10^-3
    = -13.1*10^3 = 1.31*10^4 m/s^2

    1. 👍 0
    2. 👎 0
    posted by Damon

Respond to this Question

First Name

Your Response

Similar Questions

  1. Algebra 2

    Hey, I don't understand this question I have honestly done this question about a good 3 times but never seemed to get the right answer. Please Help!!! Solve each equation by factoring. Check your answers. 7x^2=21x

    asked by Taylor on November 13, 2014
  2. Calculus

    Given: A rock is thrown upward from the surface of a planet at 24m/s. It reaches a maximum height of 180 meters. Question: How fast is the rock falling when it lands on the planet? I am honestly dumbfounded by this problem. I feel

    asked by Charlene on February 6, 2017
  3. Calculus

    Hello, I would greatly appreciate any help that I can have with the following calculus question below. It has to do with separable differential equations. I'm also going to explain what I've done so far, so please bear with me

    asked by Stephen on April 16, 2017
  4. math

    Let f(t) = Q0at = Q0(1 + r)t. f(7) = 75.94 and f(9) = 91.89 (a) Find the base, a. (Round your answer to two decimal place.) a = (b) Find the percentage growth rate, r. (Round your answer to the nearest percent.) r = % I honestly

    asked by Stella on August 29, 2015
  5. math

    i'm working on this question and honestly I have tries but I don't understanding anything about the question, can someone please HELP me? I have been posted this question and hoping for someone can help me please! For the

    asked by tj on March 5, 2015
  6. Math

    I am not exactly sure of what I'm supposed to do in the following question: Describe and correct the error, given the functions f(x)=3x - 5 and g(x)=1/3 - 4/3. The first equation is as follows: g(-3)= 1/3 - 4/3 (3) =1/3 - 4 = -3

    asked by Jessica on December 19, 2011
  7. General- In need of advice

    I am in need of blatant advice. I believe certain things. When I have to answer an open or multiple choice question for school that the answer they want me to put directly defies my beliefs and goes against my principles should I

    asked by Rainshine on December 13, 2013
  8. College Algebra

    Question: Given f(x)=x^2+3x x such that f(x)=4 (ie y=4, what is x?) I am honestly very confused by this question to even attempt to do it. Though here is what I have on the rest of my sheet as my answers. Please correct me if I'm

    asked by Anonymous on April 6, 2016
  9. Math

    What is the solution set for the quadratic equation x^2 + 6x = -5? I’m honestly confused and don’t know what to do. I don’t think the answer could be F {1} or J {-5} because it says sets. Which leaves me with G {-1,-5} and

    asked by Anonymous on April 8, 2018
  10. History-Civil War

    To Damon, if available, this is my last question in this subject..for me very confusing..don't know where to start or what I'm looking for. Do you see an overall vision, or approach to command and strategy, in Ulysses S. Grant's

    asked by Joanne on July 12, 2011

More Similar Questions