What are the characteristics of low energy waves

Free runners jump long distances and land on the ground or a wall. how do they apply newton’s second law to lessen the force of impact?

If the ama of the inclined plane below is 2, calculate the ima and efficiency. ima = efficiency =

Consider a system with two masses that are moving away from each other. why will the kinetic energy differ if the frame of reference is a stationary observer or one of the masses?