When the effect of aerodynamic drag is included, the y-acceleration of a baseball moving vertically upward is a = -g- kv², while the acceleration when the ball is moving downward is ad=-g+kv², where k is a positive constant and v is the speed in meters per second. If the ball is thrown upward with an initial speed of 30 m/s, determine the time t, from ground to apex and the time to from apex to ground. Take k to be 0.007 m¹ and assume that g is constant. au=-g-kv² y Answers: tu= i td = i 30 m/s ad=-g+kv² S S h

When the effect of aerodynamic drag is included, the y-acceleration of a baseball moving vertically upward is a = -g- kv², while the acceleration when the ball is moving downward is ad=-g+kv², where k is a positive constant and v is the speed in meters per second. If the ball is thrown upward with an initial speed of 30 m/s, determine the time t, from ground to apex and the time to from apex to ground. Take k to be 0.007 m¹ and assume that g is constant. au=-g-kv² y Answers: tu= i td = i 30 m/s ad=-g+kv² S S h