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Two astronauts of equal mass 76 kg are holding on to opposite ends of a straight rope in space. The length of the rope between them is 18 meters. They are rotating about an axis that passes through the center of mass midway between the two astronauts with angular velocity 0.8 radian/sec. One of the astronauts pulls on the rope, decreasing the distance separating them to 18/2 meters. (In the following, take the rope to be massless.) What is the new angular velocity of the two astronauts? How much work did the astronaut who pulled on the rope do?
A proton (q=1.6x10^-19 columbs) and mass = 1.67x10^-27 kg is placed 5 cm away from the center of a charged, What is the acceleration of the proton
find the magnitude and direction of the field at this point.
questiona white billiard ball with mass mw 1.32 kg is moving directly to the right with a speed of v 2.92 ms and
Consider an angular motion. If the displacement is given as 250teθ, and the radius r is constant, derive the expressions for the angular velocity θ=ω, angular accelerationα, linear displacements, linear velocitytv, normal accelerationna, and tange..
A reasonable estimate of the moment of inertia of an ice skater spinning with her arms at her sides can be made by modeling most of her body as a uniform cylinder. Estimate the skater's moment of inertia to two significant figures
A 8.00 kg bullet traveling at 475 m/s embeds itself in a 1.69 kg wooden block at rest on a frictionless surface. Find the amplitude of the subsequent simple harmonic motion
An ice skater with mass of 50 kg pushes off from the wall of an ice rink. How much work is done on the skater by the wall
An audio amplifier, represented by the AC source and the resistor R, what is the time-averaged power delivered to the speaker
A mass m slides in the bottom of a hemispherical bowl of radius R under the influence of gravity. Find the constraint force
On a very muddy football field, a 100kg linebacker tackles an 85kg halfback. What is the direction of this velocity
A 20.0-kg box rests on a horizontal surface. The coefficient of static and kinetic friction between the box and the surface are 0.30 and 0.10 respectively
An 0.82 kg bucket full of water is being swung by a rope in a vertical circle of diameter 2.31 m. Compute the least speed a bucket must be moving so that the water doesn't fall out.
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