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A freight train has a mass of 1.0 ? 107 kg. If the locomotive can exert a constant pull of 7.1 ? 105 N, how long does it take to increase the speed of the train from rest to 70 km/h?
This rope is strung over a massless, resistance-free pulley. The blocks are released from rest. Find the tension in the rope and the acceleration of the blocks
A block of mass m is pushed up against a spring,compressing it a distance x, and the block is thenreleased. The spring projects the block along a frictionlesshorizontal surface, giving the block a speed v.
Two uniform solid spheres have the same mass of 2.15 kg, but one has a radius of 0.213 m while the other has a radius of 0.867 m. Each can rotate about an axis through its center.
a dog running in an open field has components of velocity vx 3.2ms and vy -1.6 at time t 10.4s . for the time interval
An electron is initially at rest just outside a large copper surface that has the charge density of 1.20 x10-6 C/m2. How far has the electron moved in 1.07 x10-9 s if the field is uniform over this region.
The heat of fusion of ice is 335 j/g. When 50 g of ice at 0oC is added to 150 g of water at 45oC, determine what is the final temperature
A meter stick is freely pivoted about the 20 cm mark. Find the frequency of small amplitude oscillations
The distance between the first and fifth minima of a single slit diffraction pattern (on the same side of the central maximum) is 0.35 mm with the screen 45 cm away from the slit and using light of wavelength 550 nm. For this problem, you may assu..
Liquid is withdrawn slowly from the bottom of the tank
Two masses m1 and m2 are connected by an ideal spring and placedon a horizontal frictionless surface as shown. they are pulledapart so that the spring is stretched an amount x0 and then theyare released simultaneously. the constant for the spring ..
A 110kg linebacker tackles an 85kg halfback. immediately before thecollision the linebacker is slipping with a velocity of 8.8 m/snorth and the halfback is sliding with a velocity of 7.2m/s east.what is the velocity at which the two players move t..
An object is placed to the left of a lens, and a real image is formed to the right of the lens. How far from the lens is the object
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