Calculating Gravitational Potential Energy Increase: 3.0kg Object

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Homework Help Overview

The problem involves calculating the increase in gravitational potential energy for a 3.0 kg object moving vertically at a constant speed of 2.0 m/s over a duration of 4.0 seconds. The focus is on understanding the relationship between height and potential energy in this context.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • Participants discuss the need to find height to calculate gravitational potential energy and express uncertainty about applying kinematic equations at constant velocity. Questions arise about how to determine distance covered during the time interval.

Discussion Status

The discussion is active, with participants exploring different aspects of the problem. Some guidance has been provided regarding the basic relationship between velocity, distance, and time, which may help in progressing towards a solution.

Contextual Notes

Participants note the challenge of applying kinematic equations when dealing with constant velocity, indicating a potential gap in understanding foundational concepts.

Jabababa
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Homework Statement



A 3.0 kg object travels vertically at a constant speed of 2.0m/s. What is the increase in gravitational potential energy after 4.0 sec?

Homework Equations



Ep=Mgh

The Attempt at a Solution



I know i need to find the height but, with constant velocity i don't know how to plug into any kinematic equations to find the height.

The answer is 2.4 x 10^2 J.
 
Physics news on Phys.org
A change in gravitational potential energy results from a change in height. You can find that change in height using kinematics equations.
 
Yes, i know that part...but i have no idea how to plug into the kinematic equations with a constant velocity. All the equations are involved with a initial velocity and a final velocity.
 
At constant speed v, what is the distance covered during some time t?
 
omg thanks! I totally forgot the most basic one, V= d/t!
 

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