Kinetic energy after falling to 100m

[Smartgurl]

Homework Statement

A 250 g object is dropped from a height of 150 m. What is the kinetic energy after falling to 100m

Homework Equations

V2^2 = V1^2 +2ad
Ek = 1/2 mv^2

The Attempt at a Solution

I used the kinematics equation to find my v2 then I used this to find Ek. I got the answer 120J but I'm not sure if I'm doing this right

 

[Vagn]

Homework Statement

A 250 g object is dropped from a height of 150 m. What is the kinetic energy after falling to 100m

Homework Equations

V2^2 = V1^2 +2ad
Ek = 1/2 mv^2

The Attempt at a Solution

I used the kinematics equation to find my v2 then I used this to find Ek. I got the answer 120J but I'm not sure if I'm doing this right

That solution should work, alternatively you could find the change in the gravitational potential energy and equate that change to the kinetic energy.