The force of gravity is straight down.
What is force of gravity?
On Earth all bodies have a weight, or downward force of gravity, proportional to their mass, which Earth's mass exerts on them.
Gravity is measured by the acceleration that it gives to freely falling objects.
According to the question,
A block of cheese is pulled on by a string and remains at rest until we will not apply an external force.
It also posses force of gravity.
The friction acts leftwards to balance the tension that must be pulling up and to the right.
The force of gravity is straight down.
The normal force is perpendicular to the contact surface.
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