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 the speed is doubled and the radius remains the same? A. It doubles B. It quadruples C. Stays the same D. Is cut to one-half E. Is cut to one-quarter An object of mass m moves at a constant speed v around a circular path of radius r. The net force applied on the object is F. What happens to the net force if speed is doubled and radius is quadrupled? A. It doubles B. It quadruples C. Stays the same D. It is cut to one-half E. It is cut to one-quarter 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 compared to that at point B? A. The net force at point A is greater than at point B B. The net force at point A is less than at point B C. The net force is zero at all points around the circle D. The net force at point A is equal to the net force at point B A roller coaster car moves on a track with one section that is a vertical circular loop of radius R. When the car is at the top of the loop it just maintains contact with the track. What is the acceleration at car’s this point? A. g upward B. 0.5 g upward C. Zero D. 0.5 g downward E. g downward A roller coaster car moves on a track with one section that is a vertical circular loop of radius R. When the car is at the top of the loop it just maintains contact with the track. What is the velocity at this car’s point? A. B. C. D. E.
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 the speed is doubled and the radius remains the same? A. It doubles B. It quadruples C. Stays the same D. Is cut to one-half E. Is cut to one-quarter An object of mass m moves at a constant speed v around a circular path of radius r. The net force applied on the object is F. What happens to the net force if speed is doubled and radius is quadrupled? A. It doubles B. It quadruples C. Stays the same D. It is cut to one-half E. It is cut to one-quarter 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 compared to that at point B? A. The net force at point A is greater than at point B B. The net force at point A is less than at point B C. The net force is zero at all points around the circle D. The net force at point A is equal to the net force at point B A roller coaster car moves on a track with one section that is a vertical circular loop of radius R. When the car is at the top of the loop it just maintains contact with the track. What is the car’s acceleration at this point? A. g upward B. 0.5 g upward C. Zero D. 0.5 g downward E. g downward A roller coaster car moves on a track with one section that is a vertical circular loop of radius R. When the car is at the top of the loop it just maintains contact with the track. What is the car’s velocity at this point? A. B. C. D. E.
abp_uniform-circular-motion-multiple-choice_2015-10-21.docx