If the force applied to the crate is 150 N and it does not start to move, it indicates that the frictional force opposing the motion is equal to or greater than the applied force.
The horizontal net force on the crate can be calculated using the following formula:
\[ \text{Net Force} = \text{Applied Force} - \text{Frictional Force} \]
Since the crate does not move, the net force is 0 N. This implies that the frictional force must also be equal to 150 N, counteracting the applied force completely.
So, the horizontal net force on the crate is:
\[ \text{Net Force} = 0 , \text{N} \]
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