Eli5 If the equation for force is F=ma why does dropping the same object from 2 different heights change how much an object would be crushed?

1.67K views

In science one year, we did a test of dropping a water bottle from different heights over a Pringle, and we had to protect the Pringle with a paper. But how would increasing the height increase the force is the mass and acceleration is the same?

In: 152

29 Answers

Anonymous 0 Comments

The answer is that the a is bigger. Not because it’s falling from higher but because it’s traveling faster. When the object hits the ground, it’s going from some speed to 0, and it has to do that in the same amount of time regardless of how fast it’s going. I am ignoring impulse here, this is actually what’s different but this is something you won’t go over just yet. So because the speed is going from x to 0 and then from 2x to 0 or whatever, in the same time, remember that acceleration is v/t, the v is bigger so the a is bigger. Transfer that bigger a over to a bigger F when using F=ma.

You are viewing 1 out of 29 answers, click here to view all answers.