MIDTERM I - Nicholas Charles Miller- PHY183, Spring 2010 -...

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Unformatted text preview: Nicholas Charles Miller- PHY183, Spring 2010 - Physics for Scientists and Engineers I 1 Midterm I Nicholas Miller __________________________________ PRINT NAME: __________________________________ Do not open exam until instructed to do so. Nicholas Charles Miller- PHY183, Spring 2010 - Physics for Scientists and Engineers I 2 Midterm I Nicholas Charles Miller- PHY183, Spring 2010 - Physics for Scientists and Engineers I 3 Midterm I 2 pt From dimensional analysis considerations alone, mark these formulas as either valid or invalid. Assume that x has dimensions of distance, v has dimensions of velocity, t has dimensions of time, g has dimensions of acceleration and m has dimensions of mass. v/x = 7 g/v 1 . A circlecopyrt valid B circlecopyrt invalid m ( x + vt ) / (1 + gt/v ) = mgt 2 / 2 2 . A circlecopyrt valid B circlecopyrt invalid You are partially correct. Your receipt is 156-7568 1 pt A train moves at constant velocity of 60 mph. A cannon is stationed on a flatcar moving with the train. The cannon has a muzzle velocity of 120 mph. If the gunner wishes for the cannon ball to land on top of the cannon, she should: (ignore air resistance) A Aim the cannon 30 degrees from the vertical, pointing backward. B Aim the cannon straight up. C Aim the cannon 45 degrees from the vertical, pointing forward. D Aim the cannon 45 degrees from vertical, pointing backward. E Aim the cannon 30 degrees from the vertical, pointing forward. 3 A circlecopyrt B circlecopyrt C circlecopyrt D circlecopyrt E circlecopyrt You are correct. Your receipt is 156-5200 2 pt Consider the plot of position vs. time below. The point "A" is at (t=0,x=0). The velocity is uniform and negative in region ____. 4 . A circlecopyrt AB B circlecopyrt BC C circlecopyrt CD D circlecopyrt DE E circlecopyrt EF F circlecopyrt NOWHERE The acceleration is negative in region ____. 5 . A circlecopyrt AB B circlecopyrt BC C circlecopyrt CD D circlecopyrt DE E circlecopyrt EF F circlecopyrt NOWHERE You are correct. Your receipt is 156-1517 Nicholas Charles Miller- PHY183, Spring 2010 - Physics for Scientists and Engineers I 4 Midterm I 3 pt A student hurls a baseball directly upward with an initial speed of 40 m/s. Later, the student catches the baseball at the same position from which it was released. For the following statements, displacements are measured relative to the release point and the upward direction is positive....
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MIDTERM I - Nicholas Charles Miller- PHY183, Spring 2010 -...

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