Newton's second law allows us to find that the answer for the stopping time is:
Newton's second law stable that the net force on a body is proportional to the body's mass and acceleration
[tex]F =m a[/tex]
Where F is the force, m the mass and the acceleration of the body.
Initially there is a force (the fan) that makes the car accelerate and reach a certain speed, at some point the force becomes zero.
They indicate that there is no friction, therefore in the direction of movement there is no external force
[tex]\sum F =0[/tex]
Consequently, according to Newton's second law, the acceleration is zero, therefore the car stays at whatever speed it has and never stops.
The same result is obtained by applying Newton's first law, as there is no net force, the vehicle remains at rest and with constant speed.
In conclusion using Newton's second law we find that the answer for the stopping time is:
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