Answer :
The magnitude of Tom's acceleration is 0.585 m/s².
What is acceleration?
Acceleration is the rate of change of velocity with time.
Force applied by Tom's sister
The force applied by the Tom's sister is calculated by applying Newton's second law of motion as follows;
F = ma
F = 15 x 2.3
F = 34.5 N
Acceleration of Tom
The acceleration of Tom is calculated by applying Newton's third law of motion as follows;
[tex]F_{Tom} = -F_{little \ sister}\\\\F_{Tom} = - 34.5 \ N[/tex]
[tex]a = \frac{F}{m} \\\\a = \frac{-34.5}{59} \\\\a = -0.585 \ m/s^2\\\\|a| = 0.585 \ m/s^2[/tex]
Thus, the magnitude of Tom's acceleration is 0.585 m/s².
Learn more about acceleration here: https://brainly.com/question/22048837