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A cat is stuck in a tree. You are designated with the job to get it out, yet you do not want to climb the tree, because you may get stuck as well. Instead you set up a pulley system. A rope (consider it massless) runs from the seat you sit on over an ideal pulley and then to your hand. You pull on the loose end of the rope with a force of 348 N. You weigh 612 N and the seat you sit on weighs 16.0 N.
(a) What is your acceleration?
(b) What force does the seat exert on you?
(a)_____ m/s2
(b)_____ N
A potter's wheel, a thick stone disk of radius .297 m and mass 109 kg, is freely rotating at 57.5 rev/min. Find the effective coefficient of kinetic friction between the wheel and wet rag
A length of aluminium wire is connected to a precision 10.00 V power supply, and at 20.0C the current through it is measured precisely to be 0.4212 A. determine the unknown temperature
A neutron collides elastically with a helium nucleus (at rest initially) whose mass is four times that of the neutron. What is the speed of the helium nucleus after the collision
An airplane is flying with the velocity of 82.0 at an angle of 22.0 above the horizontal. When the plane is a distance 111 straight above a dog that is standing on level ground, a suitcase drops out of the luggage compartment. How far from the dog..
A ball with a diameter of 10 cm is submerged in water. The buoyant force of the water on the ball is
three electric charges QA=q,QB=-q and Qc=-2q are located at the points A(x=+a,y=0),B(x=-a,y=0) and c(x=0,y=+2a) respectively. what is the value of the electric potential at the origin
Consider a steam turbine in which the steam expands adiabatically. If the turbine consumes 1.00 kg steam each second, calculate the temperature of the steam at the exhaust
A transparent film has a thickness of 0.003250 cm, and a refractive index of 1.4000. Find the order of interference at theta=0 degrees
Suppose the steel alloy is used for an automobile axle that rotates at an average rotational velocity of 600 revolution per minute (RPM). What is the highest lifetime of continuous driving that are allowable at stress level of 310-MPa.
A common flea that has a mass of 0.008 g can jump vertically as high as 19 cm. Estimate the wavelength for the flea immediately after takeoff
A 99.5 kg horizontal circular platform rotates freely with no frictions about its center at an initial angular velocity of 1.77 rad/s. Find the angular velocity of the platform with its load
Clarisse invests $61500 in money-market accounts at three different banks. Bank A pays 2% interest per year, bank B pays 2.5%, and bank C pays 3%. She decides to invest twice as much in bank B as in bank A. After one year, Clarisse has earned $161..
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