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Answer:
7.5 m/s²
Explanation: To find the resulting acceleration when a boy with a mass of 40 kg applies a force of 300 N to push a box, you can use newtons second law of motion, which states that acceleration is directly proportional to the net force applied and inversely proportional to the mass of the object. The formula is:
Acceleration (a): Net Force (f)/Mass (m)
Given:
Mass (m) = 40 kg
Force (F) = 300 N
Substitute the values into the formula:
Acceleration (a) = 300 N / 40 kg
Acceleration (a) = 7.5 m/s²
Therefore, the resulting acceleration is 7.5 m/s² when the boy with a mass of 40 kg applies a force of 300 N to push the box to the kitchen.