- #1

- 21

- 0

## Homework Statement

I'm taking my first basic physics course and I came across this simple question (which I got the wrong answer apparently). The question was this: what is the velocity and acceleration of an object which has reached it's maximum height after being thrown directly upwards?

## Homework Equations

[/B]

Well, you don't really need equations for this, unless you want to mathematically prove your answer. In that case:

Acceleration = (Velocity - Initial Velocity) / Time

Time = Distance / Average Velocity

Velocity = Initial Velocity + Acceleration(Time)

Distance = Initial Position + Average Velocity(Time)

These are very basic Kinematic equations.

## The Attempt at a Solution

What I answered was that the velocity is 0 (which was correct) and that the acceleration was also 0 (which was incorrect). I went by the test a little too fast and realized my answer was most likely wrong after comparing answers with other students. The mistake I made was assuming that since it was at 0 velocity, there couldn't possibly be any acceleration whatsoever, but I did not take into account that acceleration = gravity. Since gravity is always influencing an object, there must be a rate of acceleration (-9,8 m/s). But my question is how could there possibly be an acceleration for an object which has a velocity of 0?