QUESTION 4 Particle is undergoing rectilinear motion as indi

QUESTION 4 Particle is undergoing rectilinear motion as indicated on figure below. Acceleration of particle is: v Av) P(t) P (t+At) negative positive zero we cannot determine QUESTION 5 In curvilinear motion, particle\'s acceleration vector is always tangential to particle\'s trajectory at varying angle with respect to particle\'s trajectory O can be normal to particle\'s trajectory b and c 10 points Save Answer 10 points Save Answer

Solution

4.We cannot determine untill the direction of change in velocity is known.(d)

5.The direction of aceelerration is a tangent at that point. So option is (a)

8.Normal acceleration = v²/r . r is halved .Therefore aceeleration will be doubled. (c)

9.centrifugal force acts away from the centre.So its positive direction acts away from the centre of curvature(a)