A 10 kg solid cylinder (I = 1/2 
) with a radius of 30.0 cm is rotating about a vertical axis through its center. If the angular momentum is increasing at the rate of 25 kg 
then what is the torque?
A. 70 N•m
B. 45 N•m
C. 37 N•m
D. 25 N•m
E. 12 N•m
D. 25 N•m
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If an object of mass 8 kg has an acceleration of 5 m/s2, what is the unbalanced force acting on it?
a. 40 N b. 1.6 N c. 0.63 N d. 13 N e. cannot be determined
A body oscillates with simple harmonic motion along the x axis. Its displacement varies with time according to the equation x = 5.0 sin (?t + ?/3). The velocity (in m/s) of the body at t = 1.0 s is
A. +7.9. B. ?7.9. C. ?14. D. +14. E. ?5.0.
The electronegativity of the inert-gas atoms is equal to:
(a) undefined (b) 0 (c) 1 (d) 2
A planet is orbiting a star. Which of the following statements is true for the acceleration and gravitational forces experienced by the star and the planet?
A) The acceleration of the planet is much more than the acceleration of the star, but the force on the star is the same but opposite the force on the planet. B) The acceleration of the planet is much more than the acceleration of the star, and the force on the planet is much more than the force on the star. C) The force on the star is much smaller than the force on the planet, but the accelerations are about equal.