A 2.0-kg block is projected down a plane that makes an angle of 20° with the horizontal with an initial kinetic energy of 2.0 J. If the coefficient of kinetic friction between the block and plane is 0.40, how far will the block slide down the plane before coming to rest?
a. 3.0 m
b. 1.8 m
c. 0.30 m
d. 1.0 m
e. 1.3 m
a
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Which type of mirror can produce a real image?
A. plane B. diverging C. converging D. No mirror can produce a real image.
In the Kelvin scale, absolute zero lies at
A) 273 degrees C. B) zero K. C) -373 degrees C. D) Both A and B are correct. E) Both A and C are correct.
Compared to the gravitational force on a 1 kg object, the gravitational force on a 2 kg object is
A) the same. B) nine times larger. C) four times larger. D) twice as large. E) None of the above.