A block of mass m is resting on a wedge of angle θ as shown in the figure. With what minimum acceleration a should the wedge move so that the mass m falls freely?
Text Solution
Verified by ExpertsThe correct answer is:
C
The components of acceleration a of the wedge and acceleration due to gravity 
is shown in the figure.
If the mass 
has to be fall freely, the component of acceleration of the wedge perpendicular to the incline should be equal to the component of acceleration due to gravity 
perpendicular to the incline.
Or, 
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