Alter Momentum

You hold your hand out as you cast the spell. If you are falling, your momentum and speed immediately drop to 0. If you were mid air when you stopped, you begin to fall again. 
If there is an object which you want to match your speed with, (eg. as a moving carriage) and you are able to touch the item or creature, your momentum and speed immediately match that of the target. 

You may cast this on an object or creature other than yourself. The object must be able to fit into a 5ft cube, and the creature must be your size or smaller. If the creature is unwilling, roll for hit against that creature as if it were an unarmed attack. 

For each level above 1st you cast this spell at, you may include an additional object or creature.

At 8th level, the size of the object or creature you can affect increases to a 10ft cube and large creatures respectively. 

At 16th level, you may cast this on yourself as if it were a cantrip, and the size increases again to include an object smaller than a 15ft cube, and huge creatures. 

The effects of this spell happen immediately and last only for the instant it takes to alter the targets momentum.