1997MT1s

# 1997MT1s - Physics 125 Test I Solutions September 30, 1997...

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Physics 125 Test I Solutions September 30, 1997 This is a closed book closed notes exam. You have 70 minutes to do the exam. You may use a calculator. Some (possibly) useful equations r = x ˆ i + y ˆ j + z ˆ k x - x 0 = v 0 t + 1 2 at 2 a r = v 2 r x - x 0 = vt - 1 2 at 2 x = - b ± b 2 - 4 ac 2 a x - x 0 = 1 2 (v 0 + v)t v = v 0 + at v 2 = v 0 2 + 2 a(x - x 0 ) Where appropriate, draw neat diagrams, labeling your axes and clearly indicating what variables you are using. Use Cartesian coordinates. Give solutions to 2 or 3 significant figures. Please remember to put your name on the test booklet and SIGN THE PLEDGE. Only the work appearing in the test booklet will be graded.

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a). Can an object have zero velocity and still be accelerating? Yes Think of a projectile at the peak of its motion. Refer to figure 1, which gives the velocity versus time of a particle moving along the x axis, for parts b). and c). b). Is the acceleration positive or negative?
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## This note was uploaded on 05/02/2008 for the course PHYS 125 taught by Professor Mutchler during the Spring '08 term at Rice.

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1997MT1s - Physics 125 Test I Solutions September 30, 1997...

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