In a cam drive with uniform velocity follower, the sharp corners of the displacement diagram are rounded off at the beginning and at the end of each stroke. This is done

• A. Because of loose contact of follower with cam surface
• B. Because the uniform velocity motion is a partial parabolic motion
• C. Because of difficulty in manufacturing cam profile
• D. In order to have acceleration in beginning and retardation at the end of stroke within the finite limits

Answer: (D)