Point deductions for late homework: 2 weeks: 25%; 3-4 weeks: 50%. No homework ac
ID: 1872597 • Letter: P
Question
Point deductions for late homework: 2 weeks: 25%; 3-4 weeks: 50%. No homework accepted after 4 weeks! For all questions, neglect air friction unless otherwise noted. 1. Neglecting friction, if a Cadillac and Volkswagen start rolling down a hill together, the heavier Cadillac will bottom () before the Volkswagen. () after the Volkswagen () at the same time as the Volkswagen. 2. The value for the acceleration due to gravity and its unit (m, s) are g 3. In a laboratory on Earth, all the air is pumped from a large tube (to remove air resistance). A feather and a steel ball are simultaneously released from rest inside the tube. What happens next? ) Both objects float weightless inside the tube () Both objects fall and hit the bottom at the same time. () The feather falls and hits the bottom before the steel ball () The steel ball falls and hits the bottom before the feather. 4. The graph of velocity vs. time of an object falling in gravity is characterized by curve A or B in the plot? OA OB Does the velocity increase at () a constant rate, i.e. with constant acceleration. () an increasing rate, i.e. with increasing acceleration. 5. The graph of distance vs. time of an object falling in gravity is characterized by curve A or curve B in the plot? OA OB Explain how the change in velocity affects the rate at which the distance increases: (1-2 sentences)Explanation / Answer
(1) They will reach the bottom at the same time.
(2) g=9.81 m/s2
(3) Both the objects will hit the bottom at the same time
(because there is no resistance due to the air)