AP Physics 1 Scoring Guide
Unit 3 Progress Check: MCQ Part B
A horizontal, circular track for running has four lanes, as shown in the figure. Various runners of different masses
use the track. In each case, the center of mass of a runner follows a circular path around the track in one of the
lanes.
Consider a runner in lane 1 with a speed and a runner in lane 4 with a speed , where the ratio of the
1.
speeds is . The radius of lane 4 is times the radius of lane 1, and both runners have the same mass.
Which of the following claims is correct about the net forces and exerted on the runners in lanes
1 and 4, respectively?
https://www.stuvia.com/
, AP Physics 1 Scoring Guide
Unit 3 Progress Check: MCQ Part B
A is equal to .
B is equal to .
C is equal to .
D is equal to .
2. Consider a runner in any of the lanes moving at a known, constant tangential speed. Which of the following
measuring tools, if any, could be used to experimentally determine the centripetal acceleration of the
runner?
A A force probe
B A protractor
C A meterstick
None of these measuring tools, by themselves, can be used with the known tangential speed to determine the
D
centripetal acceleration of the runner.
3. Now consider four runners running around the track with the same constant tangential speed, with one
runner in each lane of the track. A student is considering using the following equations to determine which
runner has the greatest acceleration.
Equation 1:
Equation 2:
Which equation should the student use, and why?
https://www.stuvia.com/
, AP Physics 1 Scoring Guide
Unit 3 Progress Check: MCQ Part B
A Equation 1, because the runners all have the same speed.
Equation 1, because the different distances traveled by the runners in a complete lap around the track
B
determine which runner has the greatest acceleration.
C Equation 2, because the acceleration term has already been isolated on the left-hand side of the equation.
Equation 2, because the radius of the circular path traveled by a runner determines the acceleration of the
D
runner.
https://www.stuvia.com/
Unit 3 Progress Check: MCQ Part B
A horizontal, circular track for running has four lanes, as shown in the figure. Various runners of different masses
use the track. In each case, the center of mass of a runner follows a circular path around the track in one of the
lanes.
Consider a runner in lane 1 with a speed and a runner in lane 4 with a speed , where the ratio of the
1.
speeds is . The radius of lane 4 is times the radius of lane 1, and both runners have the same mass.
Which of the following claims is correct about the net forces and exerted on the runners in lanes
1 and 4, respectively?
https://www.stuvia.com/
, AP Physics 1 Scoring Guide
Unit 3 Progress Check: MCQ Part B
A is equal to .
B is equal to .
C is equal to .
D is equal to .
2. Consider a runner in any of the lanes moving at a known, constant tangential speed. Which of the following
measuring tools, if any, could be used to experimentally determine the centripetal acceleration of the
runner?
A A force probe
B A protractor
C A meterstick
None of these measuring tools, by themselves, can be used with the known tangential speed to determine the
D
centripetal acceleration of the runner.
3. Now consider four runners running around the track with the same constant tangential speed, with one
runner in each lane of the track. A student is considering using the following equations to determine which
runner has the greatest acceleration.
Equation 1:
Equation 2:
Which equation should the student use, and why?
https://www.stuvia.com/
, AP Physics 1 Scoring Guide
Unit 3 Progress Check: MCQ Part B
A Equation 1, because the runners all have the same speed.
Equation 1, because the different distances traveled by the runners in a complete lap around the track
B
determine which runner has the greatest acceleration.
C Equation 2, because the acceleration term has already been isolated on the left-hand side of the equation.
Equation 2, because the radius of the circular path traveled by a runner determines the acceleration of the
D
runner.
https://www.stuvia.com/
