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A 15 kg block is on a ramp which is inclined at 20° above the horizontal. It is connected by a string to a 28 kg mass which hangs over the top edge of the ramp. Assuming that frictional forces may be neglected, what is the magnitude of the acceleration of the 28 kg block?
A 0.227-kg particle undergoes simple harmonic motion along the horizontal x-axis between the points x1 = -0.279 m and x2 = 0.469 m. The period of oscillation is 0.577 s. Find the frequency, f, the equilibrium position, xeq, the amplitude, A, the maxi..
A certain conductor has 7.60 1028 free electrons per cubic meter, a cross-sectional area of 4.00 ? 10-6 m2, Find the drift speed of the electrons in the conductor
The spheres are brought into contact and then separated to a distance of 2.40 cm. Determine the magnitude of the force that each sphere now experiences, and state whether the force is attractive or repulsive.
A rocket launched at 70 degrees to the horizontal has a constant net acceleration of 8 m/s^2 along this direction for 6.5 s and then is in free fall
A spring is standing upright on a table with its bottom end fastened to the table. A block is dropped from a height 4.4 cmabove the top of the spring. The block sticks to the top end of thespring and then oscillates with an amplitude of 13 cm.
A body moving at .500c with respect to an observer disintigratesinto two fragments that move in opposite directions relative to their center of mass along the same line of motion as the original body. What velocities will the observer find
Suppose that you start with 1.41 mg of a pure radioactive substance and 2.30 h later determine that only 0.252 mg of the substance remains
A power line carrying a sinusoidally varying current with frequency = 60 Hz and peak value I = 55 kA runs at a height of 7 m across a farmer's land. The farmer constructs a vertically oriented 2 m high 10 turn rectangular wire coil below the power..
a ball is thrown vertically upwards from a point of 1.5m above the ground with an initial velocity of 30 ms and g
A spaceship is approaching a space station at a speed of 2.0 105 m/s. The space station has a beacon that emits green light with a frequency of 5.93 1014 Hz. What is the change in this frequency
When a car is traveling at 23 m/s on level ground, the stopping distance is found to be 20 m. What is the stopping distance now, as measured along the incline
A mass of 0.5 kg is attached to the end of a massless spring of spring constant 0.75 N/m. What is the total energy contained in this system
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