Answer: 45.18 N
Explanation:
To find the force needed to accelerate the desk, we can use Newton's second law of motion, which is given by the equation:
Net force = mass × acceleration
Since we have two forces (the force accelerating the desk and the friction force), the equation can also be written as:
Net force = Force - friction force
Note that the friction force is being subtracted from the force accelerating the desk because it opposes the direction of motion and acts in the opposite direction.
Setting these two equations equal to each other:
Force - friction force = mass × acceleration
Now, plug in the given values:
Force - 21N = 18.6kg × 1.3 m/s²
Force - 21N = 24.18N
Force = 45.18 N
Therefore, a 45.18 N force to the right is needed.
Learn more about Newton's second law of motion here: https://brainly.com/question/25545050
