Calculating Ek At a specific point

[Articulum]

Homework Statement

I need to find out the Ek at "B" this is the diagram i got i want to know if its right and if it is why do i use the Height of 50 to find out Ek at "B"

Homework Equations

Ek=Ep

The Attempt at a Solution

Ek=Ep
Ek=m.g.h
Ek=100x9.8x50
Ek=49000J

 

[tiny-tim]

Welcome to PF!

Hi Articulum! Welcome to PF!

I need to find out the Ek at "B" this is the diagram i got i want to know if its right and if it is why do i use the Height of 50 to find out Ek at "B"
…
Ek=Ep
Ek=m.g.h
Ek=100x9.8x50
Ek=49000J

Yes, that's right! …

(except it's really change in Ek = change in Ep) …

but why were you worried about using 50 for B? ​

 

[Articulum]

Hi Articulum! Welcome to PF!


Yes, that's right! …

(except it's really change in Ek = change in Ep) …

but why were you worried about using 50 for B? ​

If I'm figuring out Ek at "B" shouldn't i use the height also at "B"?

 

[borgwal]

The *change* in kinetic energy plus the *change* in potential energy equals zero here: so you do need to use the height at B, or more precisely, what matters is the *difference* in height between A and B.

Probably the picture is badly drawn, I suppose the difference in height between A and B is 50m [the units for height are missing, too].

 

[Articulum]

The *change* in kinetic energy plus the *change* in potential energy equals zero here: so you do need to use the height at B, or more precisely, what matters is the *difference* in height between A and B.

Probably the picture is badly drawn, I suppose the difference in height between A and B is 50m [the units for height are missing, too].

So i use the Diffrence in height of where it starts and where the point is?

 

[borgwal]

So i use the Diffrence in height of where it starts and where the point is?

Exactly!

 

[Articulum]

Thank you so much made my Physics work much easier