When work is done on a body its energy decreases?

When work is done on a body its energy decreases?

(b) Work is done by a body against friction at the expense of its kinetic energy. Hence K.E. of the body decreases. (c) Internal forces cannot change the total or net momentum of a system. Hence the rate of change of total momentum of many particle system system is proportional to the external force on the system.

What is the science behind rubber bands?

If you stretch a rubber band, you pull those spaghetti-shaped molecules into a more or less straight line. So, the elastic quality of rubber comes from its interconnected spaghetti-shaped molecules, and from the tiny, random, jiggling motion of those molecules. That motion causes the molecules to resist straightening.

Why is rubber so stretchy?

Natural rubber is made of long chains of molecules called polymers. Because these polymers are so long (they can be thousands of molecules long) they get tangled up in themselves. When you stretch the rubber, the polymers start to elongate or stretch.

Why is rubber more elastic than steel?

The strain produced in rubber is much larger compared to that in steel. This means that steel has a larger value of Young’s modulus of elasticity and hence, steel has more elasticity than rubber.

What does a Poisson ratio of 0.5 mean?

Most materials have Poisson’s ratio values ranging between 0.0 and 0.5. A perfectly incompressible isotropic material deformed elastically at small strains would have a Poisson’s ratio of exactly 0.5. If these auxetic materials are stretched in one direction, they become thicker in the perpendicular direction.

Is rubber more elastic than steel?

So, it can be said that for a given amount of stress, the strain produced in the steel is comparatively smaller than the strain produced in the rubber. Therefore, with the help of Young’s modulus, it can be concluded that steel has greater elasticity than rubber.

Which is more elastic steel or plastic?

Answer. By definition steel is more elastic than plastic because it regain its original shape faster than rubber after removal of deforming force.

Which is more elastic steel or diamond?

Magnitude of elastic limit is the degree of elasticity of a material. Higher the elastic limit of a material, greater is its degree of elasticity . The elastic limit of diamond is more than that of steel and hence diamond is more elastic than steel.