The central and most important part of an object, movement, or group, forming the basis for its activity and growth.
Answer:
c) Isometric
Explanation:
Isometric contraction is one where the muscle develops tension, but there is no change in its external length. In other words, isometric contraction is one in which the muscle contracts and produces force without any macroscopic changes in the joint angle. This is when we try to lift an object much heavier than we can handle, as the cheerleader shown in the question above tried to do. It seems that the mechanism of this contraction lies in the fact that the energy that would normally be exhibited as external mechanical work is used in the structural rearrangement of the fibers, ie the fibers shorten and the tendon lengthens, and some of the energy dissipates into heat. .
Answer:
Great contribution.
Explanation:
Physics is a branch of science which has great contribution in every field of our life. There are various instruments that works on the principles of physics. Various machines in the hospital also made with the help of principle of physics. Physics also plays great contribution in the field of forensic sciences. Reconstruction of crime scene is an important application of Physics in forensic science which enable us to find out that whether the cases are belongs to accidents, and other crimes.