To find the acceleration of the crate, we can use Newton's second law of motion, which states:
\[ F = m \cdot a \]
where:
- \( F \) is the net force acting on the object,
- \( m \) is the mass of the object,
- \( a \) is the acceleration of the object.
In this case, Mr. Musonda is pushing the crate with a force of 75 N, and since the crate is moving at a constant speed, the acceleration is actually 0 m/s². This is because when an object is moving at constant velocity, it is not accelerating.
The forces acting on the crate (the applied force and the friction force) are balanced due to the constant speed, meaning the net force is zero. Therefore, the acceleration of the crate is:
\[ a = 0 , \text{m/s}^2 \]
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