Class 9th - Forces and Laws of Motion

Motion, we have come across several aspects to quantify the motion of a body. Some of them being distance, displacement, speed, velocity and acceleration. But we have still not discovered the cause of motion i.e., what makes a body move? How is the body able to change its speed

https://www.youtube.com/watch?v=Ty54tteGeMI&list=PLWPirh4EWFpEEeKJT2y_5UURtGCLLHz43