A Block Is Pulled at Constant Speed Along a Rough

question 102

Multiple Choice

A block is pulled at constant speed along a rough level surface by a rope that makes an angle of 30° with respect to the horizontal. The applied force along the rope is . The force of kinetic friction between the block and the surface is 10 N.
-Complete the following statement: The magnitude of the normal force could be reduced by

• A)increasing the speed of the block.
• B)decreasing the coefficient of kinetic friction.
• C)decreasing the velocity of the block.
• D)decreasing the angle made by the rope.
• E)increasing the angle made by the rope.

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Definitions:

Initial Injection

The first dose or administration of a substance or drug into a body or system.

Secondary Response

The immune system's more rapid and intense response to a pathogen when it is encountered for the second time, due to the presence of memory cells.

Initial Antigen

The first exposure of the immune system to a foreign molecule or pathogen, triggering an immune response.

Primary Response

The initial response of the immune system to a new antigen, typically involving the activation and proliferation of specific lymphocytes.