Students are likely to have come across these laws in various forms during their earlier studies of science. However, you now have to formalise their understanding, and help them to apply the laws.
Some students will feel that the laws are self-evident, but this is because they have met them before. (Don’t forget it took Galileo, Newton et al many years to establish them clearly.) They are counter-intuitive, and need a great deal of practice to ensure they are used correctly.