Answer :
Final answer:
The particle is moving in a circle and hence is undergoing centripetal acceleration. The acceleration is towards the center of the circle which in this case is the positive x-direction. This yields an answer of (2) 6.25 i m/s^2.
Explanation:
The particle is moving at a constant speed on a circular path which suggests that it is under a centripetal or radial acceleration. This centripetal acceleration always points toward the center of the circle. The equation for centripetal acceleration is a = v^2/r where v is the velocity and r is the radius of the circle. In this case, velocity v=5 m/s, and the radius of the circle r is the distance from the origin to the particle, which in this case is 4 m. Substituting these values into the equation yields an acceleration of 6.25 m/s^2. However, because the velocity vector is given as negative in the y-direction, and the acceleration is always directed toward the center of the circle, the acceleration is in the positive x-direction, so the answer is (2) 6.25 i m/s^2.
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