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A cockroach of mass m lies on the rim of a uniform disk of mass4.0m that can rotate freely about its center like a merry-go-round.Initially the cockroach and disk rotate together with an angularvelocity of .260 rad/s. Then the cockroach walks halfway to thecenter of the disk. (a) What then is the angular velocity of thecockroach-disk system? (b) What is the ratio K/Ko of the newkinetic energy of the system to its initial kinetic energy? (c)What accounts for the change in the kinetic energy?
a sprinter in a 100-m race accelerates uniformly for the first 35 m and then runs with constant velocity. if the
Two people are carrying a uniform wooden board that is 3.00 m long and weighs 160 N. If one person applies an upward force equivalent to 60 N at one end, at what point does the other person lift . If the tangential acceleration of a yo-yo at the en..
The resistance of a bagel toaster is 14 ?. To prepare a bagel, the toaster is operated for one minute from a 120-V outlet. How much energy is delivered to the toaster
A cart with mass 220 g moving on a frictionless linear air track at an initial speed of 1.0 m/s undergoes an elastic collision with an initially stationary cart of unknown mass. What is the mass of the second cart
How much work is needed to push a 132- kg packing crate a distance of 2.35 m up an inclined plane that makes an angle of 26 o with the horizontal, when inclined plane is frictionless
An ac generator has a frequency of 4.80 kHz and produces a currentof 0.0400 A in a series circuit that contains only a 231-Ω resistor and a 0.250-µF capacitor.
only two forces act on an object that is sitting on a flat horizontal surface. the mass of the object is 3.00 kg. force
A uniform ladder is 10-m long and it weighs 100-N. The ladder leans against a smooth wall with its base on a sidewalk 6-m from the base of the wall. Find the force exerted on the ladder by the wall
acetone and chloroform form a nonideal mixture. at 35 degrees celsius the vapor pressure of acetone is 347 torr and
A 5.00 kg sack of flour is liftedvertically at a constant speed of 4.00 m/s through a height of13.0 m. How much work is done on the sack by the lifting force
The engine of an aircraft propeller delivers an amount of power 179hp to the propeller at a rotational velocity of 2310rev/min. How much torque does the aircraft engine provide
a heat engine exhausts its heat at 380 celsius and has a carnot efficiency of 39. what exhaust temperature would enable
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