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A ball is dropped from rest from the top of a building and hits the ground with a speed of v. From ground level a second ball isthrown upwards with the same speed at the same instant the ball at the top is dropped. Prove that the balls cross at 3h/4.
When a 2.00-kg object is hung vertically on a certain light spring described by Hooke's law, the spring stretches 2.89 cm. If the 2.00-kg object is removed, how far will the spring stretch if a 1.00-kg block is hung on it
A 3.60 {rm m}-long, 430 {rm kg} steel beam extends horizontally from the point where it has been bolted to the framework of a new building under construction. A 66 {rm kg} construction worker stands at the far end of the beam.
Two charges q1 = 1.1 10-8 C and q2 = -4.8q1 are placed 50 cm apart. Find the point along the straight line passing by the two charges at which the electric field is zero, as measured from q1.
When a charge with q=2e moves under the influence of the electric force and an external force through a potential difference of -80V, The work done by the external force is
A 0.20 kg mass resting on a frictionless surface is attached to a solid wall by means of a spring with and elastic force constant k of 5.0 N/m. calculate the maximum velocity experienced by the mass
The middle C string on a piano is under a tension of 908 N. The period and wavelength of a wave on this string are 3.82 ms and 1.17 m, Find the linear density of the string
As a baseball is being caught, its speed goes from 31 to 0 m/s in 0.005 seconds. The mass of the baseball is 0.145 kg. What is the force acting on the ball
question1a mountain climber in procedure of crossing between two cliffs by a rope pauses to rest. she weighs 521 n. as
A racquet ball with mass m = 0.237 kg is moving toward the wall at v = 12 m/s and at an angle of ? = 30° with respect to the horizontal. What is the change in kinetic energy of the racquet ball
The land speed record of 13.9 m/s (31 mi/h) for birds is held bythe Australian emu. An emu running due south in a straight line atthis speed slows down to a speed of 10.5 m/s in 3.3 s.Assuming that the acceleration remains the same, what is the bird'..
What is the electric flux through the circle when its face is perpendicular to the field lines?
The intensity of the sound wave from a jet airplane as it is taking off is 114 W/m2 at a distance of 4.3 m. What is the intensity of the sound wave
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