# Question: A car initially at rest experiences loss of its parking

A car initially at rest experiences loss of its parking brake and rolls down a straight hill with a constant acceleration of 0.850 m/s2 traveling a total of 100 m. Let’s designate the first half of the distance as phase 1 with a subscript of 1 for those quantities, and the second half as phase 2 with a subscript of 2.

(a) The car’s speeds at the end of each phase should be related by which condition (1) v1 < ½ v2 (2) v1 = ½ v2 or (3) v1 > ½ v2?

(b) Now calculate the two speeds and compare them quantitatively.

(a) The car’s speeds at the end of each phase should be related by which condition (1) v1 < ½ v2 (2) v1 = ½ v2 or (3) v1 > ½ v2?

(b) Now calculate the two speeds and compare them quantitatively.

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