Object a Is Acted on by Only Object B

question 28

Multiple Choice

Object A is acted on by only object B. The mass of object A is 20.0 kg and its acceleration is 4.00 m/s² west. Object B is acted on by two forces, the force of object A on object B and another unknown force. If mass of object B is 40.0 kg and the acceleration of object B is 3.00 m/s² west, what is the unknown force?

• A)40 N west
• B)120 N west
• C)80 N east
• D)200 N west
• E)80 N west

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Definitions:

Blood Type

A classification of blood based on the presence or absence of inherited antigenic substances on the surface of red blood cells.

Immune System

The complex network of cells, tissues, and organs that works together to defend the body against pathogens.

Red Blood Cell

Erythrocyte; contains hemoglobin and carries oxygen from the lungs or gills to the tissues in vertebrates.

Fluid-Mosaic

A model describing the structure of cell membranes, where various proteins float in or on the fluid lipid bilayer like boats on a pond.