Physics

To find the mass of the sled, we first need to determine its acceleration using the formula:

 

Where:

is the change in velocity (final velocity - initial velocity),

is the change in time.

 

Given that the sled starts from rest (initial velocity = 0 m/s) and reaches a speed of 15 m/s in 3 seconds:

 

Now we can use Newton's Second Law to find the mass:

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