A strange science-fiction battle takes on a tiny moon in deep space; here, the moon is so smallthat we can completely ignore gravity. A deranged invading space monster of given mass 28.2kg kicks off a rocky structure to achieve a horizontal speed of 3.45 m/s directly toward a startledspace cadet. The cadet is braced firmly on the surface of the moon and is armed with a rapid-fireautomatic marshmallow blaster gun which fires multiple sticky marshmallows toward the monster, each of mass 11.5 grams and each with a speed of 53.4 m/s. The cadet attempts to stop the monster with the marshmallow gun, slowing the monster down by hitting the monster with marshmallow after marshmallow until the monster is finally brought to a stop. Required:
How many marshmallows will the cadet have to fire at the monster to stop the monster's horizontal motion?