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Q. A circular disk with a radius of 0.65 meters and mass of 0.26 kg has a hole cut in the middle. A tangential force of 5.6 Newtons is applied to the outer edge of disk and it spins about its center of mass because of this force. After being at first at rest, it spins to an angular speed of 12 rad/s in a time of 4.3 seconds. What is the moment of inertia for disk if it spun about the edge of the disk? Reply in kg m2.
what is the horizontal distance x to the base. find the average net force exerted on him in the barrel of the cannon.
how to Compute the work done by this field on a charge.
A 13 turn circular loop of wire has a diameter of 0.66m. The plane of the circular loop creates an angle of 63 to the Earth's magnetic field. In 0.15s the coil is flipped at a location where the magnitude of the Earth's magnetic field is 34 μT.
how to Calculate the acceleration of the system. Assume the magnitude of the acceleration is the same during starting and stopping.
Compute the final equilibrium temperature.
A 1000 kg car carrying four 76 kg people travels over a rough "washboard" dirt road with corrugations 4.0 m apart which causes the car to bounce on its spring suspension. The car bounces with utmost amplitude when its speed is 18 km/h. The car now ..
A 2500-kg sport utility vehicle travelling at 92 km/h can be stopped in 0.25 s if it hits a concrete wall. Assume a 60 kg person was in the car that hit this wall. The velocity of the person equals that of the car both before and after the crash, and..
A bullet of mass m = 25 g is fired into a wooden block of mass M = 4.5 kg. The block is attached to a string of length 1.5 m. The bullet is embedded in the block, causing block to then swing.
The wheel of the car has a radius of 0.340 m. The engine of the car applies a torque of 282 N•m to this wheel, that does not slip against the road surface. Since the wheel does not slip, the road must be applying the force of static friction to the w..
A group of hikers hear an echo 2.50 s after they shout. If the temperature is 28°C, how far away is the mountain that reflected the sound wave.
with what speed would the arrow leave the bow.
What total impulse was imparted by these forces. Near Earth, the density of protons in the solar wind (a stream of particles from the Sun) is 12.0 cm-3, and their speed is 702 km/s. Find the current density of these protons.
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