How many revolutions does it make during the time
A motor spins an 2 kg block around on an 80 cm arm at 200 rpm. The blosk is supported by a steel table after the motor stops. How long does the block take to come to rest? How many revolutions does it make during this time?
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A 16.0-N block rests on a horizontal surface. The coefficients of static and kinetic friction between the surface and the block are 0.880 and 0.640, respectively.
A stone is dropped into a river from a bridge 49.2 m above the water. Another stone is thrown vertically down 1.49 s after the first is dropped. Both stones strike the water at the same time. What is the initial speed of the second stone?
The drawing shows sodium and chloride ions positioned at the corners of a cube that is part of the crystal structure of sodium chloride (common table salt).
The coefficient of kinetic friction between the box and the floor is µk = 0.47. If the system is set moving at v = 10.0 m/s with the block in front of the box, how long does it take for the system to come to rest?
A physics teacher performing an outdoor demonstration suddenly falls from rest off a high cliff and simultaneously shouts "Help". When she has fallen for 3.0 , she hears the echo of her shout from the valley floor below. The speed of sound is 340.
A 81.0 skydiver can be modeled as a rectangular "box" with dimensions 18.0x 35.0 x 185 . Use the falling cylinder model for solving the problem. What is his terminal speed if he falls feet first?
An AC generator consists of 6 turns of wire. Each turn has an area of 0.040m^2. the loop rotates in a uniform field (B=0.20T) at a constant frequency of 50 Hz. what is the maximum induced emf?
You and Maria each own identical spaceships. As you fly past Maria, you measure her ship to be 96 m long and your own ship to be 100 m long. How long does Maria measure your ship to be? How fast is Maria moving relative to you?
You move the box with a constant velocity of 3 m/s. The coefficient of friction is 0.4. a) Draw a free body diagram. b) What is the new tension in the rope (it will not be 200 N).
Consider the human eye to be composed of a thin lens of uniform index of refraction n = 1.43, with fluid of n = 1 inside, with the light-receptive cells a distance 24.6mm from the lens. The eye can "focus" on different distances by changing the ra
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