A) An object of mass 2kg placed on an inclined plane accelerates down the inclin

Question

A) An object of mass 2kg placed on an inclined plane accelerates down the incline at 4.9 m/s^2. calculate the angle of the incline assuming there is no friction? What is the force exerted by the surface of the plane on the object? B) THe same object of mass 2kg placed now accelerates down another incline angled at 45 degrees at 4.9 m/s^2. Argue that this surface must have friction and calculate the coefficient of friction of this surface. What is the force exerted by the surface of the plane on the object?

Explanation / Answer

the component in the plane of inclination ... > mg sin= m*4.9

>>>> =30
force exerted by the plane >>> mg cos=16.97N
in second case as inclination is increasing force must increase and so the acceleration but it is no increasing >>>>>> there must be sume friction any friction
will be equal to *mgcos=mg-mgsin
=.4144

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