Kinetic Energy After Some Time Has Elapsed

[quido]

A balla of mass 5 kg is dropped from a height of 10 meters. What is the kinetic energy after 1 second has elapsed?First i found the velocity using this equation V^2=2gh = 14m/s

Then I used this equation to find Kinetic Energy KE=1/2mv^2 and got this 490 J.

But i don't know how to find KE after 1 second elapsed. Can anyone help me?

 

[Doc Al]

But i don't know how to find KE after 1 second elapsed.

Hint: What's the acceleration due to gravity?

 

[quido]

Hint: What's the acceleration due to gravity?

That's the all information I have.

 

[Doc Al]

That's the all information I have.

The acceleration due to gravity is a constant. Check your book. (Hint: It's used in that equation you posted earlier.)

 

[quido]

oh right. You mean 9.81m/s^2.

I used that to find Velocity? Was it wrong ?

 

[Doc Al]

oh right. You mean 9.81m/s^2.

I used that to find Velocity? Was it wrong ?

Yes, that's what I mean. Now use it to find velocity after 1 second.

 

[quido]

Oh thanks a lot.