Calculating Momentum of a Dropped Ball: Help!

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Homework Help Overview

The discussion revolves around calculating the momentum of a ball dropped from a height of 16 meters, with a mass of 100 grams. Participants are exploring the necessary steps to determine the momentum upon impact with the ground.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning, Problem interpretation

Approaches and Questions Raised

  • Participants discuss the need to first calculate the velocity of the ball before applying the momentum formula. Questions arise regarding the use of time in the velocity calculation and the correct application of kinematic equations.

Discussion Status

There is an ongoing exploration of the correct formulas and calculations needed to find the velocity. Some participants have provided guidance on using specific kinematic equations, while others express confusion about the calculations and the formulas involved.

Contextual Notes

Participants are referencing a formulas sticky for guidance, indicating that they are working within a structured homework context. There is also a sense of frustration expressed by one participant regarding their understanding of the formulas.

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Help! Momentum

A ball, of mass 100g, is dropped from a height of 16m. Its momentum when it strikes the ground is?

How do you do this calculation?

Thanks!
 
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What have you tried? Do you know what momentum is?
 
Last edited:
First you compute the velocity. Then you remember the definition of momentum. Get started with the first part.
 
Dont' I have to have time to calculate velocity? i know p=mv i just don't know the velocity
 
Look in the formulas sticky, at the top of this page. There''s one in there which you can use to solve this.
 
i do not see the formula??
 
v^2 = v_0^2 + 2 a \Delta x

\Delta x is the displacement.
 
i end up getting 313.6 m/s that can't be right? a= gravity correct?
 
You're putting in some formula wrong. Show whet you are doing, and we'll tell you where you messed up.
 
  • #10
0+(2x9.8x16) = 313.6
 
  • #11
Check the formula again.
 
  • #12
grrr I am stupid
 
  • #13
Yah A= -9.80 (Or 9.80 down) Thats the gravational force pulling down.
 

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