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Q. A flat uniform circular disk (radius = 3.00 m, mass = 1.00 102 kg) is initially stationary. The disk is free to rotate in the horizontal plane about a frictionless axis perpendicular to the center of the disk. A 45.0 kg person, standing 1.75 m from the axis, begins to run on the disk in a circular path and has a tangential speed of 2.60 m/s relative to the ground. Find the resulting angular speed of the disk (in rad/s) and describe the direction of the rotation.
A young woman buys a sports car that can accelerate at the rate of 5.47m/s2. She decides to test the car by drag racing with another speedster, Stan Speedy. Both start from rest, but experienced Stan leaves the starting line 1.47s before Kathy. Stan ..
A 67.3 kg sled starts at rest on a horizontal road. The coefficient of kinetic friction between the sled and the road is μk = 0.202. A man pulls the sled a distance 5.07 m along the ground by exerting a constant force of magnitude 532 N on a rope tha..
A baseball is thrown straight up. The drag force is proportional to.In terms of, what is the y-component of ball's acceleration when its speed is half its terminal speed and it is moving up.
A wire is stretched between two posts. Another wire is stretched between two posts that are four times as far apart. The tension in the wires is the equal, and they have the same mass.
Two charges, q1 and q2, are separated by a distance, r, and exert a force, F, on each other. What will the new force be if:
What tension is necessary to tune string properly
The temperature of the surface of a certain star is 7500 K. Most hydrogen atoms at surface of the star are in the electronic ground state. What is the approximate fraction of hydrogen atoms that are in the first excited state (and therefore could ..
What happens in the table as to the potential energies
Two point charges q1 = 3.40 nC and q2 = -5.50 nC are 0.100m apart. Point A is midway between them; point B is 0.080 m from q1 and 0.060 m from q2. Take an electric potential to be zero at infinity.
What is the magnitude of the runner's total displacement . What is the phase difference between the two waves next they reach the observer.
For the Atwood's machine, suppose the masses have an initial speed of v = 0.22 m/s and that m2 is moving upward. How high does m2 rise above its initial position before momentarily coming to rest, given that m1 = 3.5 kg and m2 = 3.1 kg.
0.75 kg block of ice is sliding by you on a very slippery floor at 2.5 m/s. As it goes by, you give it a kick perpendicular to its path. Your foot is in contact with the ice block for 0.003 seconds. The block eventually slides at an angle of 22 de..
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