An object on the flat bed of a truck that is accelerating along a straight horizontal road. The coefficient of static friction is 0.300 in this case. Of the following choices, which is the lowest value of acceleration that would result in the object sliding on the bed of the truck?
A. 0.280 m/s2
B. 0.310 m/s2
C. 2.93 m/s2
D. 2.99 m/s2
E. 3.02 m/s2
Answer: D
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A hoop is rolling without slipping along a horizontal surface with a speed of 5.50 m/s when it starts up a ramp that makes an angle of 25.0° with the horizontal. What is the speed of the hoop after it has rolled 3.00 m up the ramp?
A) 4.22 m/s B) 1.91 m/s C) 2.06 m/s D) 3.79 m/s E) 8.02 m/s
Light enters an equilateral triangle prism in a direction parallel to one side. The prism is made of glass with an index of refraction of 1.52. What is the angle between the incoming ray and the ray that leaves the prism on the other side?
A) 83° B) 19° C) 59° D) 27° E) 55°
An alpha particle is:
a. any positively charged nucleus. c. a neutral helium atom. b. an X-ray. d. None of these choices.
The average kinetic energy of a nitrogen molecule at room temperature (20°C) is
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