then you can practice Prop-Hanging correctly
A number of types will prop hang, the 172, just a little. Prop hanging in any form is very risky. In the case of engine failure, a gliding landing will not be possible, unless, you're many hundreds of feet up.
In general, 172's could be happily flown on a power on full flap landing approach at 60KIAS, and a gliding approach at 65-70KIAS. More speed is generally not helpful.