Rotational Dynamics: A cinder block of mass m = 4.0 kg is hung from a nylon string that is wrapped around a frictionless pulley having the shape of a cylindrical shell, as shown in the figure. If the cinder block accelerates downward at 4.90 m/s2 when it is released, what is the mass M of the pulley?
A. 2.0 kg
B. 4.0 kg
C. 6.0 kg
D. 8.0 kg
E. 10 kg
Answer: D
You might also like to view...
Venus has a higher average surface temperature than Mercury. Why?
A) because it is closer to the Sun B) because its surface is heated by an extreme greenhouse effect C) because its surface is covered with hot lava from numerous active volcanoes D) because its slow rotation gives it more time to heat up in sunlight
Why do we measure some distances in astronomy in light-years and some in astronomical units?
What will be an ideal response?
A very long wire carries a uniform linear charge density of 7.0 nC/m. What is the electric field strength 16.0 m from the center of the wire at a point on the wire's perpendicular bisector? (?0 = 8.85 × 10-12 C2/N ? m2)
A) 7.9 N/C B) 3.9 N/C C) 0.49 N/C D) 0.031 N/C
I attach a 4.0-kg block to a spring that obeys Hooke's law and supply 3.4 J of energy to stretch the spring. I release the block; it oscillates with period 0.15 s. The amplitude is
a. 2.2 cm. b. 3.1 cm. c. 1.6 cm. d. 20 cm. e. 4.4 cm.