Question

In July, 1969, the Command Module Columbia from the Apollo 11 Mission followed a circular path with constant linear speed while in orbit around the Moon. Considering the following options, which statement is true? OA) The magnitude of the angular acceleration is constant and non-zero. B) The magnitude of the tangential acceleration is constant and non-zero. OC) The magnitude of the total acceleration is zero. D) The magnitude of the centripetal acceleration is constant and non-zero. Question 6 (4 points) Two children sit on a Merry-Go-Round in an amusement park. Child 1 sits in a seat that is closer to the center than child 2. Which of the following is true for their rotational and linear speeds? O A) Their rotational speeds are equal but Child 1 has a greater linear speed OB) Their rotational speeds are equal but Child 2 has a greater linear speed O C) Child 2 has a greater linear speed but a smaller rotational speed. OD) Child 1 has a greater linear speed but a smaller rotational speed. MacBook Air

please just give the correct answer so i know for review i will solve thank you

Answer 1

- at Let the linear speed be v V=WR for circular motion Since is constant & R is constant w is also constant (A) Angular acceleration, a = do = 0 since w is constant (B) Tangential acceleration, a = dv = 0 dt since v is constant (c) Total acceleration is not zero since centripetal acceleration is there which is responsible for circular motton. (D) Centripetal acceleration, ae = since V & R both are constants magnitude of centripetal acceleration, ac is also constant & non zero. Hence statement (P) is true. R