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Q.A firefighter, 75 m away from a burning building, directs a stream of water from a ground-level fire hose at an angle of 28° above the horizontal. If the water leaves the hose at 40.3 m/s, which floor of the building will the stream of water strike? Each floor is 4 m high.
Q. A dock worker applies a constant horizontal force of 79.0 {rm N} to a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves 14.0 {rm m} in the first 6.00 {rm s}.What is the mass of the block of ice?
A 106 m long train begins uniform acceleration from rest. The front of the train has a speed of 23 m/s when it passes a railway worker who is standing 230 m from where the front of train started. What will be the speed of last car as it passes the..
What is an initial and final energy of the system energy? It takes .005 seconds for the bullet to embed itself into the block. What is an average impact force it experience.
Find out the object position p for the image to be erect and 7 times the size of the object. Focal length is 46 cm.
How fast can this car round a second curve of radius 320m?
If the orientation of the spacecraft is to be changed by 30.0°, for what time interval must the gyroscope be operated.
Object 1 has a mass m1 and a velocity 1 = (2.87 m/s). Object 2 has a mass m2 and a velocity 2 = (3.01 m/s). The total momentum of these two objects has a magnitude of 18.0 kg • m/s and points in a direction 66.5° above the positive x-axis. Find out m..
A ball is thrown upward at a speed v0 at an angle of 50.0° above the horizontal. It reaches a maximum height of 7.5 m. How high would this ball go if it were thrown straight upward at speed v0.
Each is afraid that one vine will break; as a result they grab each other and hang on. They swing upward together, reaching a point where the vines make an angle of 22.1° with the vertical. Find the value of the ratio m/M.
A toy car runs off the edge of the table that is 1.6405 m high. The car lands 0.3311 m from the base of the table how long does it take for the car to fall? The acceleration by reason of gravity is 9.80 m/s2.
Assume that, when Hiawatha aims vertically, his arrow reaches a maximum height of 20 m. Use this fact to find the initial speed u with which Hiawatha can launch the arrow vertically.
A bullet of mass 0.0022 kg initially moving at 496 m/s embeds itself in a large fixed piece of wood and travels 0.64 m before coming to rest. Imagine that an acceleration of the bullet is constant.
What is the horizontal distance the airplane engine falls. find out the time that was recorded on Earth.
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