AP Physics 1 Midterm Exam Review (2023/ 2024 Update) Questions and Verified Answers | 100% Correct

AP Physics 1 Midterm Exam Review (2023/ 2024 Update) Questions and Verified Answers | 100% Correct Q: A coin rests on a turntable a distance r from the axis of rotation. The turntable rotates with a constant speed of v. What is the minimum coefficient of static friction between the turntable and the coin? Answer: v^2/rg Q: An object of mass m moves at a constant speed v around a circular path of radius r. The net force applied to the object is F. What happens to the net force if speed is doubled and radius remains the same? Answer: It quadruples Q: A ball of mass m attached to a light string moves at a constant speed v in a vertical circle with a radius R. Which of the following is true about the magnitude of the net force at point A (top of circle) compared to that at point B (bottom of circle? Answer: The net force at point A is equal to the net force at point B Q: An object travels in a circular path of radius r at a constant speed v. What happens to the object's acceleration if the radius of the circle is doubled and the speed is doubled? Answer: It doubles Q: A pilot preforms a vertical maneuver around a circle with a radius R. When the airplane is at the lowest point of the circle pilot's apparent weight is 3mg, what is the velocity at the lowest point? Answer: (3rg)^1/2 Q: A man drives a car around a circular track of radius r at a constant speed v, where v is the max. speed he can maintain without slipping. If he wishes to do it a second time without slipping, which of the following are possible? Answer: He can cut the speed to one fourth and cut the radius to half. He can double to speed and quadruple the radius. Q: Two cars, one on the moon and one on Earth, are traveling around identical banked curves. Which of the following statements are true? Answer: The max. speed they can maintain without slipping does not depend on their masses. The car on the moon will have a lower max. speed. Q: A net force F acts on a mass m and produces an acceleration a. What acceleration result if a net force 4F acts on a mass 2m? Answer: 2a Q: A golf club hits a golf ball with a 700 N instantaneous force. What can be said about the instantaneous force that the ball exerts on the club?