santiago1663 santiago1663 16-01-2024 Physics contestada A motor car of mass 1200kg is moving along a straight line with uniform velocity of 90km/hr. Its velocity slows down to 18km/hr in 5 seconds by an unbalanced force. Calculate the magnitude of this force. a) 2400 N b) 4800 N c) 6000 N d) 7200 N