Calculating Gravitational Potential Energy Increase: 3.0kg Object

[Jabababa]

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.

 

[sandy.bridge]

A change in gravitational potential energy results from a change in height. You can find that change in height using kinematics equations.

 

[Jabababa]

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.

 

[voko]

At constant speed v, what is the distance covered during some time t?

 

[Jabababa]

omg thanks! I totally forgot the most basic one, V= d/t!