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1.Does all forces act on an object cause acceleration? Solution : No, if you act force on a building it do not move. 2.Explain the difference between contact and non contact force by giving examples? Contact forces: that involves physical contact.Example kicking a ball Field (non contact forces ): do not involve physical contact. Example all fundamental forces 3.what are the known fundamental forces in nature?

Radar is an abravation word: Ra stands for radio D for detection A for and R for ranging Radar designed to detect and track the presence of aircraft, missieles and other electronic technology. This system is similar with traffic control ground vehicles. The distance is calculated as given below Speed = Distance /Time

Physics explain the universe with its prporty