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A train is traveling up a 3.8^circ incline at a speed of 2.80 m/s when the last car breaks free and begins to coast without friction. How long does it take for the last car to come to rest momentari
Bonnie and Clyde are sliding 500 bank safe across the floor to their getaway car. The safe slides with a constant speed if Clyde pushes from behind with 410 of force while Bonnie pulls forward on a
When a 50-N force is applied tangentially to the disk, perpendicular to the radius, the disk acquires an angular acceleration of 90 rad/s2. What is the mass of the disk?
A 3.2 mass attached to a spring with a spring constant of 114 is oscillating in a vat of oil, which damps the oscillations. If the damping constant of the oil is 10 kg/s, how long will it take the
When catching a baseball, a catcher's glove moves by 11 cm along the line of motion of the ball. If the baseball exerts a force of 403 N on the glove, how much work is done by the ball?
If so how fast will the cars be traveling when they collided? If they did not, what is the distance between the cars at this point?
An airplane flies due south at 155 km/h relative to the air. There is a wind blowing at 89 km/h to the east relative to the ground. What are the plane's speed and direction relative to the ground?
A telescope has an objective mirror with a focal length of 16.8 m. If you use an eyepiece with a focal length of 2.00 cm, what is the overall magnification of this telescope?
What is the velocity of Toyota Prius relative to the VW Passat when they are 150 apart, just before they meet?
when the pin is removed and the gas is allowd to expand, the lenght of the gas-filled chamber doubles. the initial and final temperatures are equal. determine the spring constant.
An astronaut orbits the earth in a space capsule whose height above the earth is equal to the earth's radius. How does the weight of the astronaut in the capsule compare to her weight on the earth?
A pair of nuclei for which Z1 = N2 and Z2 = N1 are called mirror isobars. (The atomic and neutron numbers are interchangeable.) Binding-energy measurements on such pairs can be used to obtain evide
A charge of -1 Coulomb is placed at the 100 cm mark of the same meter stick. Is it possible to place a proton somewhere on the meter stick so that the net force on it due to the two charges is 0?
A plane drops a rubber raft to people who are stranded at sea. The plane is flying at an altitude of 1960 meters, at 90 meters per second. How far away from the people is the plane when the raft is
A stone is tied to a rope ( length = 1 m) and swung in a circle. Starting from rest, the angular acceleration is 3 rad/s^2. What is the magnitude of the total acceleration after 2/3 s?
A 0.1 kg rock is attached to a 2.0 m long string and swung in a horizontal circle at a speed of 30.0 m/s . Find the tension in the string?
At the point where the upper block begins to slip on the lower block determine (a) the amount by which the spring is compressed and (b) the magnitude of the force F.
A proton initially moves left to right long the x-axis at a speed of 2 ´ 103 m/s. It moves into an electric field, which points in the negative ´ direction, and travels a distance of 0.
If you place a glass test tube in water you will be able to see the tube. If you place it in clear soybean oil, you may not be able to see it. What does this tell you about the speed of light in th
At one end of the arm is the axis and at the other end of the arm is a 0.58-kg specimen holder. By how much does the aluminum arm stretch when the centrifuge has an angular speed of 180 rad/s?
Model the unit as having a coefficient of performance equal to 40% of the coefficient of performance of an ideal Carnot device.
A 1 kg iron horseshoe is taken from a forge at 900 degrees C and dropped into 4 kg of water at 10 degrees C. Assuming no energy is lost by heat to the surroundings, determine the total entropy chang
An arrow is fired horizontally at a target 30 meters away. The bullseye is at the same level as the bow. The initial speed of the arrow is 50 m/s. How long does it take to get to the target? How fa
How fast should the bat fly, v_b, to hear a beat frequency of 190 rm {Hz}? Take the speed of sound to be 344 rm m/s.
An Alaskan rescue plane traveling 30 m/s drops a package of emergency rations to a stranded party of explorers.the plane is traveling at a height of 200 m above the ground. what horizontal distance