Recent content by Konner54

  1. K

    When to use Momentum vs When to use K.E.

    This is actually for a medical school entrance exam and sadly, the questions are often painfully incomplete (in an attempt to trip you up). Thank you for the insight! I will remember this for next time.
  2. K

    When to use Momentum vs When to use K.E.

    Thankyou! I was unaware that two objects sticking together did not mean it was elastic - I just assumed that it could be considered as a single entity after the addition of the sand.
  3. K

    When to use Momentum vs When to use K.E.

    Hi Folks, This is a super simple physics problem that I just cannot understand when and where to implement the difference. Here is the problem: A 20kg Cart is moving horizontally along a friction-less track with a speed of 4 m/s when a 10 kg bag of sand is quickly placed on it. What is its new...