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Q. An object is held up by two ropes. rope 1 makes an angle of 65 degrees above horizontal and the tension in it is T1 = 26N. rope 2 makes an angle of 32 degrees above the horizontal and the object is in equilibrium. what is the tension in rope 2 (T2) and what is the mass of the object?
Q. Suppose a shuttle were launched from a launchpad on the Moon instead of the Earth's surface. What changes would we observe? Suppose it were launched from a launchpad in space in vacuum. Would it work? What changes would we observe? Explain your answer.
A 2.00-liter aluminum cylinder at 5°C is filled to the brim with gasoline at the same temperature. If the aluminum and gasoline are warmed to 59°C, how much gasoline spills out.
The total mechanical energy of the spacecraft, assume that the gravitational potential energy is zero at an infinite distance from the Earth.
A uniform plank of length 5 m and weight 231 N rests horizontally on two supports, with d = 1.43 m of the plank hanging over the right support. To what distance, x, can a person who weighs 446 N walk on the overhanging part of the plank before it ..
A hotel elevator ascends 170 m with a maximum speed of 5.9 m/s. Its acceleration and deceleration both have the magnitude of 1.5 m/s2.
A whale comes to the surface to breathe and then dives at an angle of 20 degree below the horizontal.
A stone is thrown directly upward at 15.0 from ground level and feels no appreciable air resistance. make Use of the work-energy theorem to find how high it will be when its speed has been reduced to half of its initial value.
The temperature of the surface of a certain star is 7500K. Most hydrogen atoms at the surface of 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 e..
A massless string is wrapped around a solid disk of mass m_1 and tied to a block of mass m_2. The disk is free to rotate on a frictionless horizontal axle.
Young's Double Slit Experiment is performed with 589 nm light and a distance of 2.00 m between the slits and the screen. The fifth interference minimum is observed 7.50 mm from the central maximum. Resolve the spacing of the slits.
An ocean liner leaves New York City and travels 34.0° north of east for 169 km. How far east and how far north has it gone? In other words, what are the magnitudes of the components of the ship's displacement vector in the subsequent directions.
What is the horizontal component of velocity
A man pushes a lawn mower on a level lawn with a force of 187 N. If 51 percent of the force is directed horizontally, how much work is completed by the man in pushing the mower 7.0 m.
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