Note the Physics

• Notice that the X vs. t graph is a straight line parallel to the time axis, which indicates that the x-component of the velocity (V_x) is constant.
• The approximate value for V_x can be found from the slope of the X vs. t line -- about 60 m/s.
• The fact that the X vs. t graph is a straight line, and thus that V_x is constant, means that the x-component of the acceleration is zero.
• Notice that the Y vs. t graph is curved, with negative slope, steadily increasing in absolute value. This indicates that the y-component of the velocity (V_y) is negative (downward) and increasing in magnitude (speed).
• The y-component of the velocity (but not the total velocity) is zero at the start.
• The fact that the Y vs. t graph is everywhere concave downward, or the V_y vs. t graph has negative slope, means that the y-component of the acceleration is everywhere downward (negative) in this motion.