Question

please answer 13 14 15

Answer 1

13) m=200g=0.2kg v1= 10m/a. initial momentum = mv1 hockey ball travel I'm opposite direction with velocity v2= -5m/s final momentum=mv2 change in momentum = m(v1-v2) = 0.2[10-(-5)]=0.2×15 = 3kgms-1