Which of the following statements about physical quantities is correct_________
A. The definitions of velocity magnitude and linear velocity magnitude are the same
B. An object in circular motion has the same acceleration and centripetal acceleration
C. The direction of the acceleration is always the same as the direction of the velocity change
D. The centripetal force required for an object on the equatorial surface of the earth to rotate with the earth is the same as the gravitational force on the object
Answer:C
Which of the following statements about physical quantities is correct_________
A. The definitions of velocity magnitude and linear velocity magnitude are the same B. An object in circular motion has the same acceleration and centripetal acceleration C. The direction of the acceleration is always the same as the direction of the velocity change D. The centripetal force required for an object on the equatorial surface of the earth to rotate with the earth is the same as the gravitational force on the object