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Question: On an essentially frictionless, horizontal ice rink, a skater moving at 6.0 m/s encounters a rough patch that reduces her speed by 48 % due to a friction force that is 25 % of her weight.
Part A. Use the work-energy theorem to find the length of this rough patch. Express your answer using two significant figures.
A small 12.3g plastic ball is tied to a very light 26.6cm string that is attached to the vertical wall of a room. A uniform horizontal electric field exists in this room. Find the magnitude of the electric field in the room
In an industrial cooling process, water is circulated during a system. If the water is pumped with a speed of 0.45m/sunder a pressure of 400 to rr from the first floor through a 6.0 cm diameter pipe, what will be the pressure on the next floor 4.0 m ..
While the microphone is inside the tube it may be at the center or close to the wall. How would it affect the measurement
A person stands 220m away from a sound source. how long does it take for the person to hear the sound from the moment the source of sound starts vibrating
The Moon's mass is 7.36x10^22 kg and its assumed circular orbit has radius 3.84x10^8 and a period of 27.3 days. Find the moons kinetic energy.
a stationary billiard ball mass 0.17 kg is struck by an identical ball moving at 3.0 ms. after the collision the second
Dawnelle prepares to dive off the 10m platform. What is the vertical acceleration of her center of mass
Determine the natural frequencies and mode shapes of the spring-mass system of Figure by the Holzer method when all masses are equal and all stiffnesses.
On the Moon, the average surface temperature is 127 ?C during the day and -183 ?C during the night. What is the corresponding change on the Fahrenheit scale
we have two stationary point charges q13.6e-6 c and q26.0e-6 c seperated by 0.50 m.a what is the potential energy for
To test the impact performance of a 10 cm thick gymnastics mat, a 20 kg cylindrical mass is dropped onto the mat from a height of 1 m above the mat. How much work does the mat do to stop the fall of the cylinder
A parallel-plate capacitor is charged by being connected to a battery and is then disconnected from the battery. The separation between the plates is then doubled. How does the electric held change? The potential difference? The total energy? Exp..
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