When Trevor encounters a force in the middle of the ice field:

$1.$ If the applied force is in the same direction as Trevor$$s motion, Trevor$$s motion will $\_\_\_\_\_\_\_\_\_\_\_\_\_.$

$2.$ If the applied force is in the opposite direction of Trevor$$s motion, Trevor$$s motion will $\_\_\_\_\_\_\_\_\_\_\_\_\_.$

$3.$ If there is no applied force, Trevor$$s motion will $\_\_\_\_\_\_\_\_\_\_\_\_\_.$

$4.$ If the applied force is in a direction perpendicular to Trevor$$s motion, Trevor$$s motion will $\_\_\_\_\_\_\_\_\_\_\_\_\_.[$Note: Make sure you change different variables and make observations before answering this question.$]$When Trevor encounters a force in the middle of the ice field: