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The Work-energy theorem states that the change in the kinetic energy of an object is equal to the net work done on that object: change in KE = KEf - KEi = Wnet = (Fnet )? * ΔX
Here (F net) is the component of the net force parallel to the displacement, ΔX is the displacement, KEf = ½ mVf 2 and KEi = ½ mVi 2 are the final and initial kinetic energy of the object, respectively.
Assuming that the work-energy theorem applies, and the initial kinetic energy of the block is 0.0124 J, what is its final kinetic energy after it has accelerated through the 0.54-m displacement?
A 3-kg ball traveling to the right with a speed of 4 m/s collides with a 4-kg ball traveling to the left with a speed of 3 m/s. What is the total momentum of the two balls before and after the collision
a small boat is headed for a harbor 35 km directly northwest of its current position when it is suddenly engulfed in
q1. a man pulls a crate of mass 75.0 kg across a level floor. he pulls with a force of 180.0 n at an angle of 26.0deg
question a juvenile elephant has a mass of 300kg. he wishes to fly using his very large ears. if the air speed on top
If you were to send a beam of laser light to a space station above an atmosphere and just above the horizon, would you aim the laser above, below or at the visible space station.
A wave has the following properties: amplitude = 0.208 m, period = 0.687 s, wave speed = 13.7 m/s. The wave is traveling in the -x direction
The collision among a hammer and a nail can be considered to be approximately elastic. Compute the kinetic energy acquired by a 13g nail when it is struck by a 510g hammer moving with an initial speed of 5.0m/s.
The length of the column of mercury in thermometer is 4.0 centimeter when the thermometer is immersed in ice water and 24.0 centimeter, Find what should the length be at room temperature
What is the voltage across the capacitor just after the switch is closed? What are the currents in both resistors a long time after the switch is closed?
A horizontal uniform bar of mass 2.9kg and length 3.0 m is hung horizontally on two vertical strings. String 1 is attached to the end of the bar, and string 2 is attached the distance 0.74 m from the other end.
Two loudspeakers in a 20°C room emit 629 Hz sound waves along the x-axis, If the speakers are out of phase, what is the smallest distance between the speakers for which the interference of the sound waves is constructive
a planet with a radius of 6.00 x 10^7 m has a gravitational field of magnitude 30.0 m/s2 at the surface. what is the escape speed from the planet
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