Question 7 (1 point) Two identical masses, A and B, are each tied to the ends of strings A and B, respectively, and whirled around in circles that are both oriented horizontally. The length of string A is twice that of string B. For the tension in the strings to be the same, the ratio of the speeds of the masses (vA:vB) must be Question 8 (1 point) A car is driving around a banked curve. A student sketches the FBD shown for the car. The force of static friction should be horizontal. .. FM Question 1 (1 point) Two cars, with masses of 1200 kg and 2400 kg respectively, are going around the same curve with the same speed. Which statement is true? 0 Both cars experience the same centripetal force. 0 Both cars experience the same centripetal acceleration. O The heavier car experiences twice the centripetal acceleration of the lighter ca r. O The heavier car experiences half of the centripetal force of the lighter car. Question 2 (1 point) An object is undergoing uniform circular motion. If the frequency of the motion is decreased, the centripetal acceleration is decreased. Question 3 (1 point) An object is on a rotating table, rotating with the table, as shown. A FBD drawn by a student is shown. What needs to be done to correct the FBD? O The FBD is correct. 0 The centripetal force pointing to the centre of the circle must be added. 0 The centripetal force pointing outward from the circle must be added. O The force of static friction should be the force of kinetic friction. Question 4 (1 point) For objects travelling with uniform circular motion, the centrifugal force they expeence Question 4 (1 point) For objects travelling with uniform circular motion, the centrifugal force they expeence O is radially outward O is apparently present in the noninertial frame of reference 0 increases with speed O doesn't actually exist 0 all of the above Question 5 (1 point) Uniform circular motion occurs for any object that moves in a circle. Question 6 (1 point) Which statement is true of fictitious forces? 0 They are found only in non-inertial frames of reference. 0 They are found only in inertial frames of reference. 0 They are caused by real factors such as gravity. 0 They are real forces even if their causes are not apparent. Question 7 (1 point) Two identical masses, A and B, are each tied to the ends of strings A and B, respectively, and whirled around in circles that are both oriented horizontally. The length of string A is twice that of string B. For the tension in the strings to be the J ............ .LL... .....i.:.. ...c .|.L... -.........I.. ...c .|.l.... .................. I..A...n\\ ..........L L... Question 9 (1 point) A fitness centre provides a centrifuge to help dry bathing suits after use. The spinner rotates clockwise, as shown. It the spinner were made to rotate counter-clockwise, the centripetal acceleration would reverse its direction. direction of rotatio Question 10 (1 point) A ball is suspended from the ceiling of a bus with a string as the bus moves at a constant velocity. The driver applies the brakes, and decelerates at a constant rate. During this time Q the tension in the string is zero. 0 the tension in the string is equal in magnitude than the weight of the ball. 0 the tension in the string is smaller in magnitude than the weight of the ball. 0 the tension in the string is greater in magnitude than the weight of the ball