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A uniform disk of mass 2 kilogram is spinning on its (vertical) axis of symmetry (remember the rotational inertia of a disk is given by 0.5 mr2), with an angular velocity of 5 rad/s. A piece of mud if mass 1 kilogram is dropped on the disk near its edge and the disk slows down. Evaluate what is its angular velocity now?
a charge q1 5.00 nc is palced at the origin fo an xy-coordinate system and a charge q2 -2.00nc is placed on the
A 21kg solid door is 220 cm tall, 92cm wide, What is the door's moment of inertia for rotation about a vertical axis inside the door, 13cm from one edge
A 2.0 kg ball moving with a speed of 3.0 m/s hits, elastically, an identical stationary ball as shown. find the speed and direction of the second ball after the collision
In the long jump final at the Olympics, a jumper launches herself at her max speed of 10 m/s. She generates a vertical push-off force by her legs of two times her own weight (2W).
What is the value of g at the location of this satellite. Discover the altitude of the satellite in meters.
A 88.0kN spaceship comes in for a vertical landing. From an initial speed of 1.00 km/s, it comes to rest in 2.50min with uniform acceleration. What braking force must its rockets provide? Ignore air resistance.
A standard 100 Watt (120 Volt) light bulb contains an 8.00 centimeter long tungsten filament. The high-temperature resistivity of tungsten is 9.0 ×107 Ωm. Compute what is the diameter of the filament
A rectangular coil with 20 windings carries a current of 1.87 mA flowing in the counterclockwise direction. What torque must be applied to the loop to hold it steady
In a location where the speed of sound is 346 m/s, a 2000 Hz sound wave impinges on two slits 30 cm apart. At what angle is the first-order maximum located
A rocket has a total mass of 1.12 105 kg and a burnout mass of 1.09 104 kg, including engines, shell and payload. Estimate the speed at burnout if gravity isn't neglected
A car carrying a 77-kg test dummy crashed into a wall at 27m/s and is brought to rest in 0.1 s. demonstrate that the average force exerted by the seat belt on the dummy is 18,760N.
A 795 kg car moving at 26 m/s brakes to a stop. The brakes contain about 15 kg of iron, that absorbs the energy. What is the increase in temperature of the brakes.
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