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A playground carousel is free to rotate about its center onfrictionless bearings, and air resistance is negligable. Thecarousel itself (without riders) has a moment of inertia of 125kgm^2. When one person is standing at a distance of 1.50 m fromtthe center, the carousel has an angular velocity of 0.6 rad/s.However, as the person moves inward to a point located 0.750 m fromthe center, the angular velocity increases to 0.8 rad/s. What is the person's mass?
A spaceship of proper length 306 m takes 0.75 µs to pass an Earth observer. Determine the speed of this spaceship as measured by the Earth observer.
Suppose that when a certain sound intensity level (in dB) quadruples, the sound intensity (in W/m2) doubles. Determine this sound intensity level
If the baseball exerts the force of 464N on the glove such that the glove is displaced 5.9 cm, how much work is done by the ball.
The air speed indicator of a plane that took off from Detroit reads 343 km/h and the compass indicates that it is heading due east to Boston. Calculate the speed of the plane with reference to the ground
A boy of mass 54.7 kg is initially on a skateboard of mass 2.00 kg, moving at a speed of 10.3 m/s. Find the final velocity of the skateboard
How fast is the shadow of the plane moving along the ground? (That is, what is the magnitude of the horizontal component of the plane's velocity?)
A disk rotates about its central axis starting from rest and accelerates with constant angular acceleration. At one time it is rotating at 4.1 rad/s; 45 radians later, its angular speed is 16 rad/s. Calculate (a) the angular acceleration (rad/s2), (b..
A mass of 0.62 kg, attached to a spring with a spring constant of 55 N/m, is set into simple harmonic motion. What is the magnitude of the acceleration of the mass
The radius of the moon is 1.74 x 10^6 m, the radius of the sun is 6.96 x 10^8 m, the average moon-earth distance is 3.84 x 10^8m, and the sun-earth distance is 1.496 x 10^11m. what is the apparent angle the diameter of the moon subtends, as seen f..
When a spacecraft travels from Earth to the Moon, the gravitational force from Earth initially opposes this journey. How far from Earth must the spacecraft be for the gravitational forces from the Moon and Earth to just cancel
A coil with an inductance of 16.8 H and a resistance of 5.5 ? is suddenly connected to a resistanceless battery with an ? = 194.0 V. What is the rate at which thermal energy is appearing
An air puck of mass m1 = 0.29 kg is tied to a string and allowed to revolve in a circle of radius R = 1.4 m on a frictionless horizontal table. What is the horizontal force acting on the puck
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