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A pulley with a radius of 3.0 cm and a rotational inertia of 4.5 x 10-3 kg·m2 is suspended from the ceiling. A rope passes over it with a 2.0-kg block attached to one end and a 4.0-kg block attached to the other. The rope does not slip on the pulley. At any instant after the blocks start moving the object with the greatest kinetic energy is:
Select one:
a. none (all three objects have the same kinetic energy)
b. none (all three objects have the same kinetic energy)
c. the pulley
d. either block (the two blocks have the same kinetic energy)
e. the heavier block
a solid copper sphere has a net positive charge. the charge is distributed uniformly over the surface of the sphere and
The nucleus of an atom consists of protons and neutrons (no electrons). A nucleus of a carbon-12 isotope contains six protons and six neutrons, while a nitrogen-14 nucleus comprises seven protons and seven neutrons.
An astronaut accidentally gets separated out of his small spaceship accelerating in inter stellar space at a constant rate of 100 m s-2. What is the acceleration of the astronaut the instant after he is outside the spaceship ? (Assume that there a..
A 2.00 kg block hangs without vibrating at the end of a spring(k=500 N/m) that is attached to the ceiling of an elevator car. Thecar is rising with an upward acceleration of g/3 when theacceleration suddenly ceases (at t=0).
(a) What is the final equilibrium temperature of the system?
A plane is flying in the horizontal plane. At time t1 = 0 s with the components of its velocity are vx= 100 m/s and vy = 120 m/s. At time t2= 20 s the components are vx = 80 m/s and vy = 142 m/s.
A small mass is set on the surface of a sphere. If thecoefficient of static friction is µs = 0.70, at what angle would the mass start sliding
peg is located a distance h directly below the point of attachment of the cord. If h = 0.90 L, illustrate what will be the speed of the ball when it reaches the top of its circular path about the peg?
Five vectors of equal magnitude 190mm, make angles26o, -26o, 41o,-41o,and 90o with respect to the x-axis. What is the length in (mm) of the sum of these vectors?
An ice chest at a beach party contains 15 cans of soda at 5°C. Each can of soda has a mass of 0.36 kg and a specific heat capacity of 3600 J/(kg·°C). Someone adds a 6.2 kg watermelon at 28°C to the chest. The specific heat capacity of watermelon is n..
he plane is traveling horizontally at 150.0 m/s at a height of 70.0 m above the ground. Illustrate what horizontal distance does the package travel before striking the ground?
A transformer connected to a 120 V ac line needs to supply 12,500 Vac to power an immense neon sign used as a business advertisement. What is the ration of secondary to primary turns of the transformer needed in order to make the sing light-up?
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