The biceps brachii inserts into the radius at an angle of 90 degrees at a distance of 0.025 meters from the elbow joint. How much force must the biceps exert to produce an angular acceleration at the elbow of 3.17 rad/sec2, if the mass of the arm and hand is 5.5 kg, and the radius of gyration is 0.24 meters

Which of the following situations is impossible? a) an object has velocity directed east and acceleration directed east. b) an object has zero velocity but non-zero acceleration. c) an object has constant non-zero velocity and changing acceleration. d) an object has velocity directed east and acceleration directed west. e) an object has constant non-zero acceleration and changing velocity.