Which of the following aluminum alloys should you consider the primary candidate for a design where specific yield strength is the most critical design factor?
(a) 2024-T62
(b) 7075-T6
(c) 2090-T86
(d) 8090-T651
(c) 2090-T86
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Constant Acceleration Kinematics: A car starting from rest accelerates at a constant 2.0 m/s2 for 10 s. It then travels with constant speed it has achieved for another 10 s. Then it finally slows to a stop with constant acceleration of magnitude 2.0 m/s2. How far does it travel after starting?
A. 200 m B. 300 m C. 400 m D. 500 m
A 90. kg person is sitting in a boat at rest with a mass of 100 kg. In the boat is a stone with a mass of 5.00 kg. The person throws the stone at 4.00 m/s horizontally in the NORTH direction. The velocity of the person and the boat after the throwing of the stone is
A. 2.00 m/s NORTH. B. 1.21 m/s SOUTH. C. 1.21 m/s NORTH. D. 0.11 m/s SOUTH. E. 0.11 m/s NORTH.
Consider a primed frame that moves in the +x direction with respect to the unprimed frame. Choose from the answers above and to the right to indicate the direction of the electric field in the primed frame.
A. A B. B C. C D. D E. Toward the viewer F. Away from the viewer T. There is no field of this type.
If a child swinging to and fro on a playground swing stands up, her time for a to-and-fro swing is
A) longer. B) shorter. C) unchanged.