You conjure a slim rope if air in your main hand.

Launch. Make a ranged spell attack against a single target to launch a small item within 10-feet of you, weighing up to 5-lbs. The item can be launched up to 60-feet. Once the object is in motion, you can no longer directly control its trajectory. Objects turned into projectiles with this spell will cause 1d8 damage upon impact (Daggers would do piercing damage, rocks would do bludgeoning damage, and so on). 

At Higher Levels.The spells damage and weight limit increases when you reach 5th level (2d8 and 10-lbs), 11th level (3d8 and 15-lbs), and at 17th level (4d8 and 20-lbs).

Trip. You use the wind whip to trip a creature of 1 size smaller than the caster. The creature must succeed on a Dexterity Saving Throw equal to the castor's Spell Save DC, upon a failure the creature is tripped prone, nothing happens on a success. 

At Higher Levels. At 6th level you can use this spell to target a creature of your size, and at 12th level you can use this spell to trip a creature one size larger than yourself.