Mark launches a toy rocket straight up from a flat surface. The rocket reaches a height of 168 m Up Portion Down Portion before starting to fall back to the ground. Halfway h = 168 m down, the rocket opens a parachute and instantly reduces its acceleration to -4.2 m/s2 for the remainder of the fall. Calculate the velocity of the rocket the instant before it hits the ground. Assume Parachute that down is the negative direction and the opens halfway rocket free is in free fall except for when the down parachute is open. lop smil-vlipolev nevip out laced efffenimeled 8 -10 20= t 2 Standards and Rubric: I can use mathematics and computational thinking to describe the relationships between on, velocity, acceleration and other physical properties. Advanced 3- Meeting 2 - Approaching 1 - Starting 0 - No Evidence n to meeting: Demonstrates a general Demonstrates some