How do I calculate the maximum height of a pendulum swing?

[kenny521]

Homework Statement

A pendulum consists of a 1.5kg mass swinging at the end of a string of length 2.0m. At the lowest point in the swing the tension in the string is equal to 20N. To what maximum height above this lowest point will the mass rise during its oscillation?

Homework Equations

I'm not sure.

The Attempt at a Solution

Idk where to start.

 

[berkeman]

Homework Statement

A pendulum consists of a 1.5kg mass swinging at the end of a string of length 2.0m. At the lowest point in the swing the tension in the string is equal to 20N. To what maximum height above this lowest point will the mass rise during its oscillation?

Homework Equations

I'm not sure.

The Attempt at a Solution

Idk where to start.

Start with the relevant equations. What is the equation that relates the force on an object that is in uniform circular motion? What is different about a pendulum -- what extra force(s) are in play?

Draw a free body diagram (FBD) for the mass at the bottom part of the swing...