a. * p= mv * p= (1000 kg)(20 m/s) northward * p= 20000 kg•m/s northward b. * p= mv * p= (54 kg)(2 m/s) westward * p= 108 kg•m/s westward c. If the velocity doubles, then * p=mv * 200 kg•m/s= mv * 2(200 kg•m/s)= m(2v) * 400 kg•m/s= m(2v) If the mass triples, then * p=mv * 200 kg•m/s= mv * 3(200 kg•m/s)= (3m)v * 600 kg•m/s= (3m)v