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quiz7bsoln

# quiz7bsoln - N AME Quiz 7b Phys270 Section 01 1 2[10...

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NAME: Quiz #7b: Phys270 Section 101 2. [10 ptsJA cow is running at a relativistic velocity towards a shed. The shed has two doors opposite one another. The cow is 2m long as measured in the cow's rest frame and the shed is lm long as measured in the shed's rest fiame. A farmer in the shed's refbrence frame observes the cow fit into the shed, and closes the two paper thin doors and fraps the cow momentarilybefbre the cow plows through the backdoor. a. [3 ptslAt what minimum speed is the cow running leave your answer in terms of the speed of light clP lnl ,. nrr.J-, !^ \< 1*' ( utgrl '^+*f'f ;7 t- \'/ .. -( '/1 % V b. [4 ptsl From the cow'sperspective, how long is the barn (that is, the spacing between the doors) based on your answer to part ap J;% J-3 z wl : 'L- C t Vr,,*r . V:V*r.,r 4wt = tf V -V*ia c. [3 pslOrder the following events in the cow's refbrence frame (and state which events ocurr at the same time): *L event a: Cow breaches the back door- I event b: Cow's nose reaches back door 2 event c: Cow's tail reaches front door f,event d: Cow's tail reaches back door " I event e: Farmer closes back door 2event fi Farmer closes

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quiz7bsoln - N AME Quiz 7b Phys270 Section 01 1 2[10...

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