When a ball is thrown horizontally and another is dropped, which will be faster?

Simultaneously , a ball is thrown upwards and another dropped from rest. Which one hits the ground moving faster?

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The ball thrown upwards because during it's descent as it starts to fall back down it's velocity is increasing due to acceleration from gravity hence the greater the distance the greater velocity it will achieve before hitting the ground

Can someone please give me a detailed explanation on this?

well, really its velocity is changing by 9.8m/s every second. so the velocity is not necessarily increasing.

Also, about the problem generally, we are not supposed to just give you the answer on this forum. But we can help. My advice is to think about energy. Start thinking of things you know about energy in this situation.

Changing is what I meant , how does energy relate to this question? It is to do with projectiles , are you referring to kinetic energy of the ball?

Simultaneously , a ball is thrown upwards and another dropped from rest. Which one hits the ground moving faster?

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The ball thrown upwards because during it's descent as it starts to fall back down it's velocity is increasing due to acceleration from gravity hence the greater the distance the greater velocity it will achieve before hitting the ground

I'm not confident with my anwser ; is it safe to say its velocity is increasing by 9.8 m s-1 every second?

Can someone please give me a detailed explanation on this?

Changing is what I meant , how does energy relate to this question? It is to do with projectiles , are you referring to kinetic energy of the ball?

As for the equation, use the kinematic equation of motion for constant acceleration (gravity's acceleration is constant for this problem) -- use the one that relates the final velocity to initial velocity and acceleration, and the one that relates final position to initial position, velocity and acceleration...

Yes, the ball has kinetic energy and one other kind of energy. I was hinting about energy, because I think your teacher will be more happy if you give an explanation using the concept of energy. Your answer: "The ball thrown upwards because during it's descent as it starts to fall back down it's velocity is increasing due to acceleration from gravity hence the greater the distance the greater velocity it will achieve before hitting the ground" Is true, but not very qualitative. A better answer would be to say something definite about the difference in kinetic energy of the two balls when they hit the ground.

Edit: I meant to say quantitative, not qualitative. Those two are easy to get mixed up :)

I'm positive that the velocity of the ball that was thrown up on its way down will be greater than the ball that was dropped from rest but another person who I posed this question says otherwise that both balls would hit the ground with the same velocity since acceleration is constant for both balls regardless of the height it was dropped from or thrown up

So it is the ball thrown up then? Could anyone explain why relating to projectiles because we haven't covered energy in my class yet so It must be to do with velocity and acceleration

So it is the ball thrown up then? Could anyone explain why relating to projectiles because we haven't covered energy in my class yet so It must be to do with velocity and acceleration

ehild

ehild has the correct explanation as far as avoiding energy explanations. Here's an alternative, though: Isn't it true that if you throw a ball in the air that, by the time it falls to the same height you threw it from, it has the same speed (just in a different direction)? You should see that this is true just from the symmetry of the parabolic trajectory.

Now, consider the limiting case of the balls being released from a small distance above the ground.

So it is the ball thrown up then? Could anyone explain why relating to projectiles because we haven't covered energy in my class yet so It must be to do with velocity and acceleration