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In a train yard, train cars are rolled down a long hill in order to link them up with other cars as shown. A car of mass 4000. kg starts to roll from rest at the top of a hill 5.0 m high, and inclined at an angle of 5.0° to the horizontal. The coefficient of rolling friction between the train and the track is 0.050. What velocity would the car have if it linked up with 3 identical cars sitting on flat ground at the bottom of the track?
A large, hot pizza 84 cm indiameter and 2.0 cm thick, with a temperature of 92°C, What is the order of magnitude of its rate of energy loss
In a fast-pitch softball game the pitcher is impressive to watch, as she delivers a pitch by rapidly whirling her arm around so that the ball in her hand moves on a circle. Determine the angle of the total acceleration relative to the radial direct..
Four equal charges of +2.5×10-6 C are placed on the corners of one face of a cube of edge length 15.0 cm. A charge of -2.5×10-6 C is placed at the center of the cube. What is the magnitude of the force on the charge at the center of the cube?
A stretched string has a fundamental frequency of 175 Hz. Discover the new frequency if you simultaneously do all of the following 3things: you increase the tension in the string by a factor of 4, and you double its length and you decrease the mass p..
question while exploring a cave a spelunker starts at the entrance and move the lowing distances. she goes 75.0m north
How many protons hit the target. How much energy is delivered to the target each second if the protons each have a kinetic energy of 30 MeV and lose all of their energy in the target.
A 50 kg block is tied to a 100kg block by a horizontal rope. What is the tension in the rope between the two blocks
An object is placed 10 m before a convex lens with focal length 5.3 m . Another convex lens is placed 6.84 m behind the first lens with a focal length 6.2 m. At what distance is the second image from the second lens?
two small nonconducting spheres have a total charge of 94.8 uc. when placed 1.10 m apart the force each exerts on the
An open container holds ice of mass 0.530 kg at a temperature of -15.7 Celsius . The mass of the container can be ignored. How much time passes before the ice starts to melt
A 2.65 kg mass oscillates back and forth on a spring with a velocity vector that varies as a function of time according to the following v(t)=(3.95cm/s) sin [0.79 rad/s], What is the maximum speed of mass
The 50-kg crate of Prob. 3/1 is now projected down an incline as shown with an initial speed of 7 m/s. Investigate the time t required for the crate to come to rest and the corresponding distance x traveled if (a) ? = 15° (b) ? = 30°
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