Let's say there are two sprites and one of them is draggable. How to implement "impact" when the draggable sprite hits the second one, such that the second sprites starts moving with the speed of the draggable one. Here is what I tried: create() { this.cat = this.game.add.sprite(...); this.cat.body.bounce.setTo(0.5, 0.5); this.cat.input.enableDrag(false, true, false, 255); this.dog = this.game.add.sprite(....); this.dog.body.bounce.setTo(0.5, 0.5);}update() { game.physics.collide(this.cat, this.dog);}It seems this code does nothing. Could you help please?