関連ワード:  what is velocity in physics class 11    what is speed in physics class 11    what is instantaneous velocity in physics class 11    what is angular velocity in physics class 11    what is escape velocity in physics class 11    what is terminal velocity in physics class 11    what is relative velocity in physics class 11    what is average velocity in physics class 11    what is critical velocity in physics class 11    what is uniform velocity in physics class 11