show that the radius vector from the force to the particle sweeps area at constant rate.
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Since the particle is in circular motion, the direction of its velocity and acceleration changes continuously. So the option A can be ruled out.
To cover equal area in equal time particle will have to move with constant speed. If it increases its speed, area swept will be larger than the area swept in the previous time period. So the option B is right.
Since the speed is constant, its tangential acceleration is equal to zero (a constant). So the option 'D' is also right. Total acceleration, however, does not remain constant.
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