4 Inertial frame of reference is a frame of reference that is: (a) At rest (b) Moving with constant velocity (c) Moving with constant acceleration (d) (a) and (c) (e) Both (a) and (b) 5 Non-inertial frame of reference is a frame of reference that: (a) Undergoes acceleration (b) Is directed toward the centre of a circular path (c) Both (a) and (b) (d) None of the above 6 Centripetal acceleration: (a) Is directed toward the centre of a circular path (b) Converts energy into linear motion (c) Is directly related to the period of rotation (d) Is directed away from the center on a circular path 7 For an object kept in a circular path, the centripetal acceleration: (a) Increases with the period of revolution. (b) Decreases with the period of revolution. (c) Doesn't change with the period of revolution. (d) Not enough information is provided to answer 8 Apparent weight is: (a) Gravity acting on an object in a non-inertial FOR. (b) Normal force acting on an object in a non inertial FOR. (c) Gravity force acting on an object in an inertial FOR. (d) Normal force acting on an object in an inertial FOR. 9 What provides the centripetal force for a car moving around in a circle on a banked curve covered with very slippery ice? (a) The weight of the car (b) The friction between the tires and banked curve (c) The vertical component of the normal force (d) The horizontal component of the normal force 10 True of False? An object moving with uniform circular motion experiences a net force of zero 11. True or False? Objects move in uniform circular motion because they are acted on by a force that points toward the centre of the circular motion. 12 True or False? The centrifugal force is a fictitious force 13 True or False? The scenario of an airplane taking off into the sky to bring the passengers to their destination involves non-inertial frame of reference if passenger are the observers