The chart lists the masses and velocities of four objects. a 3-column table with 4 rows titled motion data. the first column labeled object has entries w, x, y, z. the second column labeled mass (kilograms) has entries 58, 34, 89, 60. the third column labeled velocity (meters per second) has entries 1, 2, 0.5, 2. which object requires the greatest change in momentum in order to stop its motion? w x y z

Consider a 1000 w iron whose base plate is made of 0.5 cm thick aluminum alloy 2024-t6 (ρ = 2770 kg/m3 and cp = 875 j/kg°c). the base plate has a surface area of 0.03 m2. initially, the iron is in thermal equilibrium with the ambient air at 22°c. assuming 90% of the heat generated in the resistance wires is transferred to the plate, determine the minimum time needed for the plate temperature to reach 200°c.