Final answer:
Using Newton's second law of motion, the net force acting on a 2-kg block accelerating at 5 m/s² is calculated to be 10 N, corresponding to answer A.
Step-by-step explanation:
When a 2-kg block slides from rest with negligible friction and accelerates at 5 m/s², we can use Newton's second law of motion to find the net force acting on it. Using Newton's second law of motion, the net force acting on a 2-kg block accelerating at 5 m/s² is calculated to be 10 N, corresponding to answer A.
Newton's second law states that the net force on an object is equal to the mass of the object multiplied by its acceleration (F = m × a).
In this case, we have a mass (m) of 2 kg and an acceleration (a) of 5 m/s², so the net force (F) is:
F = m × a = 2 kg × 5 m/s² = 10 N.
Therefore, the net force acting on the block is 10 N, which makes the correct answer A. 10 N.