Physics Semester 2 Final Exam Review Answers - Grosse Pointe Public School System (Page 3 of 6) in pdf

Physics Semester 2 Final Exam Review Answers - Grosse Pointe Public School System Page 3

Physics Semester 2 Final Exam Review Answers

Page 3

Pictured below is a new roller coaster. A physics student riding and the coaster car have a combined mass of 200 kg. The car is at rest at point A

and there is no braking at point D. Assume no friction between the coaster car and the track.

80 m

40 m

5 m

28. Rank the total energy from least to greatest.

The total amount of energy stays the same the whole time

29. Rank the gravitational energy from least to greatest.

D B C A

30. Rank the kinetic energy from least to greatest.

A C B D

31. Rank the speed of the cart from least to greatest.

A C B D

32. What happens to the energy as the cart rolls from A to B?

The gravitational energy is converted to kinetic energy

33. Determine the student’s gravitational energy at point A.

160000 J

34. Determine the student’s kinetic energy at point A.

0 J (it is stopped)

35. At point B, her height is only 5 m. Determine her gravitational energy and kinetic energies at point B.

Gravitational Energy = 10000 J

Kinetic Energy = 150000 J

36. At point D the coaster is on the ground and still moving. How fast is it going at Point D?

40 m/s

On a real rollercoaster friction (both from the track and the air) are very present.

37. Draw pie charts for a real rollercoaster as it moves from points A to B to C to D?



K + G +T



G + K +T



K + T

Physics Semester 2 Final Exam Review Answers - Grosse Pointe Public School System Page 3