A turntable has a moment of inertia of 3.0 × 10^?2 kg·m2 and spins freely on a frictionless bearing at 25 rev/min. A 0.60-kg ball of putty is dropped vertically on the turntable and sticks at a point 0.10 m from the center. By what factor does the kinetic energy of the system change after the putty is dropped onto the turntable?
a. 0.91 b. 1.0
c. 0.83 d. 1.5
c
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As you watch a star, you see it move 15 degrees across the sky. How long have you been watching it?
A) 1 hour B) 1 minute C) 15 minutes D) 3 hours E) 15 seconds
A 600-kg car is going around a banked curve with a radius of 110 m at a speed of 24.5 m/s. What is the appropriate banking angle so that the car stays on its path without the assistance of friction?
A) 29.1° B) 13.5° C) 33.8° D) 56.2° E) 60.9°
In a nonlinear elastic material, the ratio of the increment in applied stress to the increment in strain measured at the total strain is the _____________modulus.
Fill in the blank(s) with the appropriate word(s).
An object is discovered near the earth with values of 2E/m = 2.12 × 107 m2/s2 and L/m = 7.8 × 1010 m2/s. This object is in what kind of orbit around the earth?
A. Elliptical B. Parabolic C. Hyperbolic