2) How can you determine the momentum of a train?

3) a skateboarder with a mass of 60 kg moves with a force of 20 N. what is her acceleration? explain

4) a 10-N force is applied to two toy cars; car A has a mass of 100 kg, and car B has a mass of 90 kg. which car will have greater acceleration? how much greater? explain

5) a car is accelerating at 3 m/s^2. what will its acceleration be if it tows another car of equal mass? explain
Help me please