Question

This image shows the various forces acting on a block of rock situated on a rock slope. What does arrow 4 represent?

A. Normal force
B. Gravitational force
C. Shear force
D. Shear strength

Answer 1

The correct Answer is B

the reason why is because arrow 4 is the only one pointing directly down.

Does gravity go sideways? up? diagonal? NO! gravity goes down and only down. therefore making the arrow going directly down: Gravity

Answer 2

4 is gravitational force

Option B

Step-by-step explanation:

This is a force diagram of a block on an inclined plane.

The force component is what makes up weight in the diagram. Weight is given as mass multiplied by the gravity.

Gravitational force acts downward and it is the force of attraction between all objects and the earth. It is directly proportional to mass.

Force 1 and 2 are both shear forces that acts parallel to the face of the incline. They are mostly expressed as frictional forces.