Astro Cat Explains… Newton’s Laws
Looking for some truly awesome science to wow the kids with? This week, Professor Astro Cat explains the amazing world of motion. Objects don’t just move around on their own – it’s all about the forces applied to them! Without further ado, let’s get to grips with some of the most important laws of physics…
The first of Newton’s laws simply says that an object will stay still unless a force (e.g. a push or pull) acts on it. Or, if the object is already moving, then it will keep moving at the same speed, until a force like friction changes it.
The second law requires thinking caps firmly placed on our heads – it explains how the velocity (speed of travel) of an object changes when a force acts on it. A very heavy object will not accelerate as much as a lighter object when both objects have an equally strong force applied to them.
Now, you’ve probably heard this one before: for every action, there is an equal and opposite reaction! In science, that means that when one object exerts a force on the other, that other objects hits back with equal force!
These laws are essential for understanding how objects behave when they’re moving – for example, how a plane takes off and flies (a changing relationship between thrust and drag forces). Learn more about the mind-boggling world of physics with the book from Flying Eye Books, Professor Astro Cat’s Atomic Adventure, by Dr Dominic Walliman and Ben Newman. To discover even more fascinating facts and test your knowledge in awesome jetpack challenges, download the app Professor Astro Cat’s Solar System now!