Spring Scale Problem: Finding Time w/ Force & Mass

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To solve the problem, the user calculates acceleration by dividing the force (1.3 N) by the mass (1.5 kg), resulting in an acceleration of approximately 0.87 m/s². They then use the equation for distance, ΔX = VoT + 0.5aT², with Vo set to 0, to find the time taken to cover 2.7 m. After substituting the values, they arrive at a time of 2.49 seconds but express uncertainty about its correctness. Additionally, they inquire whether it is possible to determine the spring constant k using the formula f = kx. The discussion focuses on applying Newton's laws and kinematics to solve the problem accurately.
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Homework Statement


You use a spring scale to pull a 1.5 kg object on a horizontal frictionless surface with a constant horizontal force of 1.3 N (according to the scale reading). You use a stopwatch to time how long it takes the object, starting from rest, to cover a distance of 2.7 m. What is the reading of the stopwatch?

Homework Equations


F=-KX
F=ma
\Delta X=VoT+.5aT^2

The Attempt at a Solution


So I did a=F/m to get the acceleration then plugged that into \Delta X=VoT+.5aT^2 and Vo is equal to 0. After i plugged it all in I got 2.49, is that right? For some reason it seems wrong.
 
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On a side note, is possible to find k using f=kx?
 

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