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A 70-Kg Block on a Horizontal Frictionless Surface Is Attached to to a Light

question 61

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A 7.0-kg block on a horizontal frictionless surface is attached to a light spring (force constant = 1.2 kN/m) .The block is initially at rest at its equilibrium position when a force of magnitude P acting parallel to the surface is applied to the block,as shown.When the block is 8.0 cm from the equilibrium position,it has a speed of 0.80 m/s.How much work is done on the block by the force P as the block moves the 8.0 cm? A 7.0-kg block on a horizontal frictionless surface is attached to a light spring (force constant = 1.2 kN/m) .The block is initially at rest at its equilibrium position when a force of magnitude P acting parallel to the surface is applied to the block,as shown.When the block is 8.0 cm from the equilibrium position,it has a speed of 0.80 m/s.How much work is done on the block by the force P as the block moves the 8.0 cm?   A) 7.4 J B) 5.4 J C) 6.1 J D) 6.7 J E) 4.9 J


Definitions:

α-Helix

A common helical structure found in proteins, characterized by a right-handed coil where each amino acid residue correlates with a 100-degree turn in the helix.

Beta-Pleated Sheet

A common motif of secondary structure in proteins characterized by beta strands connected laterally by at least two or three backbone hydrogen bonds, forming a generally twisted, pleated sheet.

Globin

A group of proteins that form part of the structure of hemoglobin, responsible for oxygen transport in the blood.

Peptide Bonds

Chemical bonds formed between amino acids during protein synthesis, linking the carboxyl group of one amino acid to the amino group of another, releasing water.

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