A 0.420-kg soccer ball is kicked at an initial speed of 35.0 m/s at an angle of 38.0° to the horizontal. What is the kinetic energy of the soccer ball when it has reached the apex of its trajectory? J

The coefficient of friction is a number that represents the resistance to sliding between two in contact with one another.

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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.