A firefighter of mass 31 kg slides down a vertical pole with an acceleration of 4 m/s^2 The acceleration of gravity is 10 m/s^2

What is the friction force that acts on him?
Answer in units of N.

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answer and explanation;

composition refers to both the types of minerals within a rock and the overall chemical makeup of the rock while texture refers to the size and arrangement of the minerals or grains that make up a rock. both composition and texture can be used to classify rocks, such as igneous rocks. texture describes how the rock became solid or crystallized from liquid, melted rock. composition of a rock describes the minerals that make up a particular rock.