This discussion focuses on calculating the impact force of a dropped object without measuring time. The normal force is identified as a key concept, with the impact force varying significantly based on the material the object collides with, such as steel versus marshmallows. To estimate the force, participants suggest measuring the distance the object travels from impact to rest and applying energy principles or kinematic equations. The discussion emphasizes the importance of the collision material's properties in determining the impact force.
PREREQUISITESPhysics students, engineers, and researchers interested in impact dynamics and experimental mechanics will benefit from this discussion.
The impact force depends greatly on what the object is colliding with. The average impact force would be much greater if the object collided with a piece of steel versus colliding into a pile of marshmallows. If you can't meeasure the time, because it will be too small to measure, perhaps you could measure the distance that the object traverses from its initial impact to to the point where it comes to a stop. Then use energy principles or the kinematic equations. If you're dropping the object onto a hard surface, you'll be out of luck in determining the distance of the impact length; you might want to use a pile of loose sand (or marshmallows), but the impact force would be very specific to the properties of the material with which the object collides.Greywolfe1982 said:I'm trying to think of a way to measure the force of an impact on an object (I think it would be the normal force...?) using experimental data only. Because of that I'm restricted to not using time, and I can't think of how else to calculate the force. Is there an equation that can get me started?