Rotational Dynamics: As shown in the figure, a 35.30-kg box is attached to a light string that is wrapped around a cylindrical frictionless spool of radius 10.0 cm and moment of inertia 4.00 kg ? m2. The spool is suspended from the ceiling, and the box is then released from rest a distance 3.50 m above the floor. How long does it take for the box to reach the floor?
A. 2.97 s
B. 2.85 s
C. 0.892 s
D. 4.18 s
E. 5.89 s
Answer: A
You might also like to view...
Velocity: A motorist travels 160 km at 80 km/h and 160 km at 100 km/h. What is the average speed of the motorist for this trip?
A. 84 km/h B. 89 km/h C. 90 km/h D. 91 km/h
Which planet has the most extreme differences between its daytime and nighttime temperatures?
A) Mercury B) Venus C) Earth D) Mars E) Jupiter
At an instant when a particle of mass 50 g has an acceleration of 80 m/s2 in the positive x direction, a 75-g particle has an acceleration of 40 m/s2 in the positive y direction. What is the magnitude of the acceleration of the center of mass of this two-particle system at this instant?
a. 60 m/s2 b. 56 m/s2 c. 40 m/s2 d. 50 m/s2 e. 46 m/s2
Rotation curves for spiral galaxies show
A) they are slowing down. B) most have dark halos. C) rotation speed drops off further from the nucleus. D) most of the mass lies in the nucleus. E) no relation to mass.