A plane stress element on a bar in uniaxial stress has a tensile stress of ?? 5 78 MPa (see fig.). The maximum shear stress in the bar is approximately:
(A) 29 MPa
(B) 37 MPa
(C) 50 MPa
(D) 59 MPa
(D) 59 MPa
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When viewing your image in a hand-held mirror, if you move the mirror away at a speed v, the image appears to:
a. also move away at v. c. move away at 2v. b. move away at v/2. d. not move.
Because the _______________ of the Moon and the Sun vary slightly, the disk of the Moon is sometimes too small to cover the disk of the Sun
Fill in the blank(s) with correct word
Projectile Motion: A boy kicks a football with an initial velocity of 20 m/s at an angle of 25° above the horizontal. If we neglect air resistance, the magnitude of the acceleration of the ball while it is in flight is
A. 25 m/s2. B. 18 m/s2. C. 9.8 m/s2. D. 8.5 m/s2. E. 0 m/s2.
Bullet G is dropped, from rest, at the same time that another bullet H is fired horizontally from a rifle. If both bullets leave from the same height above the ground, then
A) bullet G hits the ground before bullet H does. B) both bullets hit the ground at the same time. C) bullet H hits the ground before bullet G does. D) not enough information is given to compare when they hit.