A 250 g object dropped from a height of 150 m reaches a kinetic energy of 120 J after falling to 100 m. The calculations utilize the kinematic equation V2^2 = V1^2 + 2ad to determine the final velocity (V2) and the kinetic energy formula Ek = 1/2 mv^2. An alternative method involves calculating the change in gravitational potential energy and equating it to the kinetic energy. Both approaches confirm the accuracy of the 120 J result.
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That solution should work, alternatively you could find the change in the gravitational potential energy and equate that change to the kinetic energy.Smartgurl said: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