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A sled with a mass of 8.00 kg moves in a straight line on a frictionless horizontal surface. At one point in its path, its speed is 3.20 m/s; after it has traveled 2.70 m beyond this point, its speed is 6.10 m/s. Use the work-energy theorem to find the force acting on the sled, assuming that this force is constant and that it acts in the direction of the sled's motion.
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Two blocks (M1 = 2.75 kg and M2 = 6.49 kg) are in contact on a frictionless, horizontal tabletop. What is the contact force between the blocks
How many electrons would have to be removed from one sphere and added to the other to cause an attractive force between the spheres of magnitude 1.00 x 10^4 N (roughly one ton)? Assume that the spheres may be treated as point charges.
A window air conditioner has an average coefficient of performance of 2.3. In a futile attempt to cool a bedroom, Determine the net heat added to the room by operating the air conditioner in this manner
An electron is accelerated from rest to 5.60x10^6 m/s in 1.50 us by a uniform electric field calculate the work done by the electric field
An electron has an initial velocity of 3.50 106 m/s in the x direction. It enters a uniform electric field = (400 N/C) , which is in the y direction. (a) Find the acceleration of the electron.
he wavelength of an electromagnetic wave inside water (nwater = 1.33) is ? = 660 nm. find the wavelength of the same electromagnetic wave
Suppose the light bulb in the figure below is replaced with a short wire of zero resistance, and the resistance of the rails is negligible, What is the current in the rod
A uniform electric field of magnitude 256 V/m is directed in the negative y direction. Through what potential difference did the charge move
Find the angular velocity of a centrifuge in which a particle 10 cm from the axis of rotation experiences a radial acceleration of 10^3 times g
The mass of a newborn baby's brain has been found to increase by about 1.6 mg per minute. How much does the brain's mass increase in one day? How long does it take for the brain's mass to increase by 0.0045 kg ?
The distance between two telephone poles is 48.0 m. while a 0.600 kg bird lands on the telephone wire midway between the poles, the wire sags 0.200 m. Draw a free-body diagram of the bird. (Do this on paper. Your instructor might ask you to turn i..
A mass is attached to a spring of spring constant 60.0 N/m along a horizontal, frictionless surface. what is the amplitude of the oscillating mass
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