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A point-like mass m=0.5 kg is attached to the rim of a uniform disk of moment of inertia I=0.05kg m^2 and radius a=0.25m. The disk can rotate about frictionless horizontal axis. The disk, released when the mass points at "3 o'clock" position, starts rotation in the clockwise direction. Find the initial angular acceleration and the maximum angular speed.
A factory worker pushes a 26.0 kg crate a distance of 6.6 m along a level floor at constant velocity by pushing horizontally on it. What magnitude of force must the worker apply
Take two containers, each with volume 0.1 m3, containing ideal gases of monatomic He at T= 104 K and diatomic N2 at T = 236 K, What is the change of dimensionless entropy solely due to the fact that the gases have more volume accessible
An additional magnetic field, horizontal and to the right, of 0.3 T is turned on. What are the magnitude and direction of the torque vector on the loop?In Nm
If an astronaut dropped a small rock near the surface of Neptune, how far (in m) would the rock fall in 1.5 s
A proton moves perpendicular to a uniform magnetic field. Its trajectory is a circle of radius 0.31 m with a period of 2.1 10-7 s. find the magnitude of centripetal force exerted on the proton
A cannon ball of mass 10 kg is launched at its melting point with an initial velocity of 100 m/s. If all of its kinetic energy is converted to heat energy, causing the cannon ball to completely melt but not increase in temperature, what is the lat..
An empty rubber balloon has a mass of 10-g. The balloon is filled with helium at a density of 181-kg/m^3. what is the tension in the line
In the Bohr model, as it is known today, the electron is imagined to move in a circular orbit about a stationary proton. what would be the corresponding orbital radius
Two particles, with charges of q1 = 60.0nC and q2 = ?60.0nC, are placed at the points with coordinates, Find the electric potential energy of the configuration of the three fixed charges
Suppose you are riding a stationary exercise bicycle, and the electronic meter indicates that the wheel is rotating at 12.7 rad/s. how far would you have gone if the bike could move
What is the maximum speed of the mass. What is the radial acceletation experience by mass while it remains at its max. angular speed.
A projectile is launched straight up at 141m/s. How fast is it moving at the top of its trajectory? Presume it is launched upward at 45 degrees above the horizontal plane. How fast is it moving at the top of its curved trajectory.
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