A student has begun training for basketball tryouts by running every evening. Part of the run has a very steep hill. One evening, she was running down the hill at a very fast pace when she noticed a dog lying in the middle of her path. She tried to stop to avoid hitting the dog but it
was very difficult. With a lot of effort, she was able to stop right before running into the dog.
Explain why it was so difficult for the student to stop.

Abeverage can is made of 3004-h19 aluminum alloy (elastic modulus 69 gpa, tensile yield strength 285 mpa, density 2.72 g/cm^3). the dimensions on the can are approximated as a thin-walled cylinder with a height of 4.83 inches, diameter of 2.60 inches. empty the can has a mass of 14.2 g. determine: a. the wall thickness of the cylinder b. assuming a pinned-pinned condition what is the critical load? c. assuming a fixed-fixed condition what is the critical load?