A car travels on a road that, if viewed from the side, has a semicircular dip. When at the bottom of the dip, the occupants of the car feel as though they weigh twice their normal weight. What is the radius of the semicircle if the speed of the car is 27 m/s?
A. 37 m
B. 132 m
C. 149 m
D. 74 m
C. 149 m
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The rigid body shown rotates about an axis through its center of mass and perpendicular to the paper. If M = 2.0 kg and L = 80 cm, what is the kinetic energy of this object when its angular speed about this axis is equal to 5.0 rad/s? Neglect the mass of the connecting rod and treat the masses as particles.
A. 18 J B. 15 J C. 12 J D. 23 J E. 26 J
The grand unified theory (GUT) would reduce the fundamental forces to
A) 1. B) 2. C) 3. D) 4. E) 10.
The centers of two slits of width a are a distance d apart. If the fourth minimum of the interference pattern occurs at the location of the first minimum of the diffraction pattern for light of wavelength ?, the ratio a/d is equal to
A.
B.
.C.
.D.
.E.
.A soda straw is stuck into water at an angle of 36° to the vertical. Looking straight down, what does the angle of the submerged portion of the straw to the vertical appear to be?