Question

Newton's second law states that net force is equal to mass times acceleration. Provide examples of how this law can be witnessed in everyday life and explain why this law is important in astronomy.

Answer 1

Newton's second law - F=ma

where m is the mass of the object and a is the acceleration of object . This law states that to change the velocity of the object you have to exert force on it . which is proportional to its mass for example if you want to change the velocity of a object A which weighs 1 kg by 1m/s then within 1 second. then you have to exert 1 N force on it . but if you apply similar conditions on 2 kg mass then you have to apply 2N force .

We witness uncountable example of this law in our daily life . few of them are -

When you push your cart in shopping mall you have to exert force on it . which also depends the mass of the objects in cart .

or you want to throw a stone in air . you have to apply force that will cause acceleration .

If you want to stop your moving car or move your stationary car you have to apply force to change its velocity and produce acceleration .

This law is important in every aspect of nature it predicts the dynamics if you know the total force acting on the body . in astronomy there is a gravitational force acting on every celestial body and you can predict the orbit equation by this law . also this law are strongly related to Kepler's law which dictates the equation of orbit which is very useful in astronomy