Mechanical energy is the sum of potential energy and kinetic energy present in the components of a mechanical system. It is the energy associated with the motion and position of an object.I think it is supposed to be mechanical energy. That is where energy is present in an object because of it's movement's.R. the sum of kinetic and potential energy present at the same time. Mechanical energy is the sum of potential energy and kinetic energy present in the components of a mechanical system. It is the energy associated with the motion and position of an object. I think it is supposed to be mechanical energy.
How to Do the Hip and Lower Back Stretch. 1  Begin in a forward lunge position with your right leg forward. Drop your left knee to the ground. 2  Place your right elbow on the inside of your right knee as pictured. 3  Press your right elbow gently into your right knee and twist your torso to the left.
A quick but non-objective way to measure your lower-back flexibility is by sitting and reaching forward towards your toes. If your hamstrings feel super tight as youâre trying to reach, stretching them each day for 30 seconds will aid in increasing lower back flexibility.ften lower back pain, and hamstring tightness go hand in hand. To stretch the hamstring lay on your back and pull one leg up half way towards your chest, holding it with both hands. Holding this position, extend your lower leg and push your heel towards the ceiling. Hold this position for 20-30 seconds on each side.