Exam 1 Spring 2005 Solutions

# Exam 1 Spring 2005 Solutions - Physics 221 2005S Exam...

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Physics 221 2005S Exam 1-solutions Page 2 of 18 The following applies to questions [1] and [2]: A 2-kg block slides up an incline which. The initial speed of the block, at the bottom of the incline, is 2 m/s. The acceleration of the block is 7.2 m/s 2 down the ramp. [1] How far along the incline will the block go before it momentarily stops? (A) 9cm (B) 13cm (C) 20cm (D) 28cm (E) 33cm ANSWER: D Using the v 2 formula, 2a x=0-v 2 Thus x=-v 2 /(2a)=-(2m/s) 2 /(2(-7.2m/s))=0.28m _______________________________________________________________________ [2] If a hand pushes on the sliding block perpendicularly to the incline surface, (A) The magnitude of weight increases.
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Exam 1 Spring 2005 Solutions - Physics 221 2005S Exam...

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