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Two persons each of mass m are standing at the two extremes of a railroad car of mass M resting on a smooth track (figure 9-E10). The person on left jumps to the left with a horizontal speed u with respect to the state of the car before the jump. Thereafter, the other person jumps to the right,again with the same horizontal speed u with respect to the state of the car before his jump. Find the velocity of the car after both the persons have jumped off.
If the lumberjack now trots toward the other end of the log with a speed of 2.7 m/s relative to the log, illustrate what is the lumberjack’s speed relative to the shore?
An astronaut arrives at a new planet, and gets out his simple device to decide the gravitational acceleration there. Prior to this arrival, he noted that the radius of the planet was 7040 km. If his 0.400-m-long pendulum has a period of 1.0 s, what i..
A Boeing 747 jet with a wingspan of 60.0 m is flying horizontally at a speed of 295 m/s over Phoenix, Arizona, at a location where Earth's magnetic field is 49.5 µT at 58.0° below the horizontal. What voltage is generated among the wingtips?
ater at the top of Niagara Falls has a temperature of 10degrees celius. calculate the temperature of the water at the bottom of the falls
A horizontal force of 200N is applied to a 55kg cart by a child across a 10m level surface. The cart accelerates at 2m/s^2. What force of friction acts to retard the motion of the cart
A velocity selector has a magnetic field of magnitude 0.28 G perpendicular to an electric field of magnitude 0.43 kV/m. What energy must electrons have to pass through undeflected
A horizontal laser beam by wavelength 660nm passes through a rectangular glass prism (with a vertex angle of 33.5 degrees) and is deflected 22.7 degrees below the horizontal. a) Discover the angle of refraction b) Compute the index of refraction of t..
A 40-kg projectile leaves a 2000-kg launcher with a speed of400 m/s. What is the recoil speed of the launcher
A thin flake of mica (n = 1.58) is used to cover one slit ofa double-slit interference arrangement. what is the thickness of the mica
After sliding down a snow-covered hill on an inner tube, Ashley is coasting across a level snowfield at a constant velocity of +2.9 m/s. How fast do the two of them slide across the snow
Styrofoam has a density of 300kg/m3. What is the maximum mass that can hang without sinking from an 80.0cm -diameter Styrofoam sphere in water
A rifle bullet with a muzzle speed of 330 m/s is fired directly into a special dense material that stops the bullet in 25.0 cm. Assuming the bullet's deceleration to be constant, what is the magnitude
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