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A block hangs from a string from the outside rood of a van. When the van rounds a corner of radius equal to 150cm at a speed of 28m/s,the block swings to the outside and makes and angle theta with the vertical. Determine the angle
When a bow and arrow are cocked, a force is applied to the string to pull it back. Is the energy of the system increased? Explain
A rocket passes Earth and travels to a star, 80 light-years away. The earth hand the star are in the same frame of reference and the rocket moves at 0.9c with respect to the earth and the star. How many years does it take the rocket to reach this s..
When a 2.10-kg object is hungvertically on a certain light spring described by Hooke's law, the spring stretches 2.84 cm. What is the force constant of the spring?
A particle leaves the origin with an initial velocity=(3.76i)m/s and a constant acceleration =(-1.43i-2.69j) m/s^2. find velocity and position vector of particle
A professor's office door is 0.9 wide, 2.0 high, and 4 thick; has a mass of 25; and pivots on frictionless hinges. A "door closer" is attached to door and top of the door frame.
For someone who chooses y=0 to be 5 meteres above the ground and up as positive, what will he get for the potential energy
A racing dog is initially running at 15.0 m/s, but is slowing down. How fast is the dog moving when its kinetic energy has been reduced by half
The earth's magnetic field, with a magnetic dipole moment of 8.0×1022A?m2 , is generated by currents within the molten iron of the earth's outer core. What is the current in the current loop
An object acted on by three forces moves with constant velocity. One force acting on the object is in the positive x direction, Find the direction of the third force acting on the object
A second baseman tosses the ball to the first baseman, who catches it at the same level from which it was thrown. How long is the ball in the air
What is the maximum angle of incidence for a light ray within the water to strike the glass wall and still emerge to the outside air
A compact disk on a CD player rotates clockwise. The disk completes one revolution in 0.260 s. Find the angular velocity of the disk
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