6 A mass of 12 0 kg is placed on a table A string is tied to

Last updated: 6/21/2023

6 A mass of 12 0 kg is placed on a table A string is tied to the mass and run over a pulley to a hanging mass If the coefficient of static friction between the mass on the table and the table is 0 342 what is the minimum value of the hanging mass that will start the system moving a 12 0 kg b 9 80 kg c 4 10 kg d 3 42 kg 7 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 a the tension in the string is zero b the tension in the string is equal in magnitude than the weight of the ball C the tension in the string is smaller in magnitude than the weight of the ball d the tension in the string is greater in magnitude than the weight of the ball 8 To be considered in uniform circular motion a body must do what move in a circular path maintain a constant speed a b c maintain a constant distance from a centre point all of the above 9 An airplane with a mass of 800 kg is flying in a circle of radius 500 m at 50 m s What is the centripetal force required to keep the airplane flying in the circle a 50 N b 80 N C 4000 N d 8000 N 10 Astronauts that spend long periods of time in free fall suffer from health effects including a muscles becoming larger b bones losing calcium C heart and blood vessels becoming smaller and constricted d kidneys processing less urine