A bar that is motionless relative to the Earth lies on the horizontal surface of the table. It is acted upon by the force of gravity, the modulus of which is 20 N, and the force of elasticity.
a) Why does the elastic force arise?
b) What is the modulus of this force?
a) The force of elasticity arises due to the force of gravity acting on the bar; b) The modulus of gravity.
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