A student with a mass of 100kg and an initial velocity vector of 6.20 m/s in the +x direction hops on a skateboard of 10kg mass. The skateboard is initially at rest. Ignore frictions and gravity. Draw a picture. Find the magnitude of the initial total linear momentum vector of the student plus the skateboard, O 136 kg * m/s 620 kg * m/s 1180 kg * m/s 80.6 kg * m/s 1300 kg * m/s Submit Request Answer Part B After the student hopped on the skateboard, what is the speed of the skateboard plus the student? 0.958 m/s 12.5 m/s 5.64 m/s 6.93 m/s 1,30 m/B