headrests on the seats in a car in terms of Newton’s Laws
1/ Discuss the use of headrests on the seats in a car in terms of Newton’s Laws. You need to explain all the terms used and provide a comprehensive answer.

2/ The great Roman Poet, Lucretius wrote, ” Things cannot be born from nothing, cannot when begottend brought back to nothing.” This statement became an accepted theory as a result of the work of the chemist, Lavoisier in the 18th centurary. This is the law of conservation of matter. Simiarly, the law of conservation of energy is an important law in physics. Can you discuss the validity of the conservation of energy in terms of potential (gravitational or elastic) and kinteic energy by giving real-life applications