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A flywheel turns through 36 rev as it slows from an angular speed of 4.8 rad/s to a stop.
(a) Suppose a constant angular acceleration, compute the time for it to come to rest.
(b) Find its angular acceleration?
(c) Find how much time is required for it to complete the first 18 of the 36 revolutions?
A 7.80-g bullet moving at 480 m/s penetrates a tree trunk to a depth of 4.5 cm. find the average frictional force that stops the bullet
In Millikan's experiment, an oil drop of radius 1.85 μm and density 0.852 g/cm3 is suspended in chamber C whilst a downward electric field of 0.62 × 10^5 N/C is applied. Find the charge on the drop, in terms of e.
the inside of a room is to be maintained at 20 degrees celsius while the outside temperature is -10 degrees celsius.
Today's terrestrial background radiation is about 50 mrem/year, mainly due to the uranium and thorium decay chains, and potassium. The earliest evidence of life on earth was about 3.5 billion years ago.
q1. consider a person of mass 72 kg. what would his mass be if he was composed entirely of neutron-star material of
water flows straight down from an open faucet. the cross-sectional area of the faucet is 1.2 times 10-4m2 and the speed
Two people carry a heavy electric motor by placing it on a light board 1.50{\rm m} long. One person lifts at one end with a force of 370{\rm N} , What is the weight of the motor
in a hydrogen atom in its lowest energy state the single electron and the single proton are separated by a tiny
A steel washer is suspended inside an empty shipping crate from a light string attached to the top of the crate. The crate slides down a long ramp that is inclined at an angle of 39 degrees above the horizontal. The crate has mass 244 kg .
A disk with moment of inertia I1 rotates about a frictionless vertical axle with angular speed wi. find the ratio of the final to the initial rotational energy
Theoretically where on a rollercoaster should you feel the heaviest? Use the concept of inertia. Where do you actually feel the heaviest
In a tug of war on a slippery floor, Jose of mass M pulls on the rope and imparts an acceleration a to Juanita, of mass m. Calculate the tension if Jose's mass is 80kg and Juanita's mass is 60kg, and she accelerates toward Jose at .1m/s2
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