# Lecture29 - NASA hires you to develop a new spacecraft. It...

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PRS Question 1 While driving on I-285 a bug collides inelastically (splatters) on your windshield. What undergoes the greater momentum change? 1) The bug 2) The car 3) Both are the same 4) Cannot determine
PRS Question 2 An object is moving to the right. It explodes. Which of the diagrams COULD represent the INITIAL VELOCITY of the 3 fragments. 1) all 2) none 3) all but A 4) C and D 5) all but C HINT: think about the momentum of the system A B C D

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PRS Question 3 A bullet of mass m is travelling horizontally to the right. It embeds itself into a large block of mass M that is resting on a frictionless surface. What is the final speed of the block, if the speed of the bullet is v just before it strikes the block? 1) v 5) m/(m+M) v 2) √ m/(m+M) v 6) M/m v 3) (M+m)/m v 7) √(m+M)/m v 4) m/M v
PRS Question 4

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Unformatted text preview: NASA hires you to develop a new spacecraft. It will utilize solar sails. You must first determine whether the sails should be shiny (reflects photons) or dark (absorbs photons). 1) Shiny 2) Dark Follow-up Example: If the sun's intensity is 1400 W/m^2, how large a sail do we need to generate 1N of force on the sail, the gravitational force on an apple on Earth? PRS Question 5 If Thomson's 'plum pudding' model was correct, what COULD have happened when Rutherford fired high energy alpha particles at gold foil? A) alphas pass right through, no deflection B) alphas experience small deflections C) alphas experience large deflections D) alphas are 'reflected' 1) A 2) B 3) all but D 4) C and D 5) all but A 6) A and B 7) All are possible...
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## This note was uploaded on 01/20/2009 for the course PHYSICS 2211 taught by Professor Uzer during the Fall '08 term at Georgia Institute of Technology.

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Lecture29 - NASA hires you to develop a new spacecraft. It...

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