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An extreme skier, starting from rest, coasts down a mountain that makes an angle of 34.2 ° with the horizontal. The coefficient of kinetic friction between her skis and the snow is 0.156. She coasts for a distance of 17.0 m before coming to the edge of a cliff. Without slowing down, she skis off the cliff and lands downhill at a point whose vertical distance is 3.93 m below the edge. How fast is she going just before she lands?
A 192-kg satellite is in circular orbit around the Earth and moving at a speed of 4.55 km/s. How much work must be done to move the satellite into another circular orbit
A proton accelerates from rest in a uniform electric field of 524 N/C. At some later time, its speed is 2.36 × 106 m/s. What is its kinetic energy at the later time
You are designing a hydraulic lift for an automobile garage. It will consist of two oil-filled cylindrical pipes of different diameters. What should be the diameter of the pipe under the platform
A proton is located at y=0.06m and has a velocity of 5x10^6 m/s in the +x direction while an electron is located at x=0.08m, What is the magnetic field generated by these two charges at the origin
On an essentially frictionless, horizontal ice rink, a skater moving at 4.1 m/s encounters a rough patch that reduces her speed by 49% due to a friction force that is 26% of her weight. find the length of this rough patch
The rod shown in the drawing is pivoted about an axle passing through its center (solid circle). Is the net torque about the axle due to these forces zero
The United States and South Korean soccer teams are playing in the first round of the World Cup. find its velocity at the time of interception
A closed box has two metal terminals a and b. The inside of the box contains an unknown emf emf in series with a resistance R, Find the emf and R
Postively charged aluminum ion AL3+ has a mass of 4.50^-26? kg. After being accelerated through a potential difference of 650 V, Calculate the radius of the path of the ion in the field
A compressed air cylinder stands at 93.0 cm tall and has internal diameter 20.7cm. At room temperature, its pressure is 172 atm. how many moles of air are in the cylinder
What is the friction force that acts on the firefighter?
How much time does it take to lift container with the motor.
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