Question

Directions: For each of the questions 46-50, two of the suggested answers will be correct. Select the two answers that are best in each case, and then fill in both of the corresponding circles on the answer sheet. IMAGE IS NOT AVAILABLE TO COPY Which of the following statements is true regarding an object undergoing uniform circular motion? Select two answers. (A) The velocity of the object must be constant. (B) The speed of the object must be constant. (C) The acceleration of the object must point away from the center of the circle. (D) The acceleration of the object must point toward center of the circle.

Name: Problem 48, Chapter 14: Cracking The AP Physics 1 Exam
Uploaded: 2021-07-15T15:06:32-08:00
Duration: 1 min 22 s
Channel: Pritesh Ranjan

   Directions: For each of the questions 46-50, two of the suggested answers will be correct. Select the two answers that are best in each case, and then fill in both of the corresponding circles on the answer sheet.
IMAGE IS NOT AVAILABLE TO COPY
Which of the following statements is true regarding an object undergoing uniform circular motion? Select two answers.
(A) The velocity of the object must be constant.
(B) The speed of the object must be constant.
(C) The acceleration of the object must point away from the center of the circle.
(D) The acceleration of the object must point toward center of the circle.

Cracking The AP Physics 1 Exam

Robert Franek 1st Edition

Chapter 14, Problem 48

Instant Answer

Solved by Expert Pritesh Ranjan

07/15/2021

Step 1

This is because the direction is dependent on the direction of the tangent to the circle at that point. Therefore, the velocity of the object, which is a vector quantity dependent on both speed and direction, is not constant. So, option (A) is incorrect. Show more…

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Directions: For each of the questions 46-50, two of the suggested answers will be correct. Select the two answers that are best in each case, and then fill in both of the corresponding circles on the answer sheet. IMAGE IS NOT AVAILABLE TO COPY Which of the following statements is true regarding an object undergoing uniform circular motion? Select two answers. (A) The velocity of the object must be constant. (B) The speed of the object must be constant. (C) The acceleration of the object must point away from the center of the circle. (D) The acceleration of the object must point toward center of the circle.

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Key Concepts

Velocity versus Speed

Speed is the scalar measure of how fast an object is moving, whereas velocity is a vector that includes both speed and direction. In uniform circular motion, while the speed is constant, the velocity is continuously changing due to the constant change in direction.

Centripetal Acceleration

Centripetal acceleration is the acceleration that occurs in circular motion, which is always directed toward the center of the circle. This inward acceleration is responsible for changing the direction of the velocity vector, keeping the object in its circular path.

Uniform Circular Motion

Uniform circular motion refers to the movement of an object along a circular path at a constant speed. Even though the speed of the object remains unchanged, the constant change in the direction of the velocity vector means the object is accelerating.

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