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A stone is dropped at t = 0. A second stone, with 6 times the mass of the first, is dropped from the same point at t = 56 ms.
(a) How far below the release point is the center of mass of the two stones at t = 310 ms? (Neither stone has yet reached the ground.)
(b) How fast is the center of mass of the two-stone system
A penguin slides at a constant velocity of 1.4 m/s down an icy incline, How much time is required for the penguin to slide to a halt after entering the horizontal patch of ice
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A conducting rod of length 0.5 m slides along a frictionless table at a constant velocity 1.5 m/s. A uniform magnetic field of 0.75 T is normal to the surface.
A uniform plank of length 5.0 m and weight 225 N rests horizontally on two supports, with 1.1 m of the plank hanging over the right support. To what distance x can a person who weighs 415-N walk on the overhanging part of the plank before it just ..
Two identical +9.5 uC point charges are initially 3.5cm apart from each other. If they are released at the same instant from rest, how fast will each be moving as they are very far away from each other? Assume they have identical masses of 1 mg.
A particle is launched in a gravitational field (g) with an initial velocity of v nought at an angle of theta with respect to the horizontal, Write down the equations for displacements along x- and along the y- axis as a function of time (t)
what is the minimum acceleration necessary for the plane to take flight.
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Two cicadas, Chirpy and Milada, jump from the top of a vertical cliff. Chirpy just drops and reaches the ground in 3.10 , while Milada jumps horizontally with an initial speed of 98.
Two identical point charges are fixed distance from one another. If one of their charges was doubled an the other was halved, how would the electric force be affected.
A hot dog cooker heats hot dogs by connecting them to 120 V household electricity. A typical hot dog has a mass of 50g and a resistance of 130ohm . How long will it take for the cooker to raise the temperature of the hot dog from 20c to 80c ? The ..
Far in space, where gravity is negligible, a 485kg rocket traveling at 95.0m/s fires its engines. It shows the thrust force as a function of time. The mass lost by the rocket during these 30 s is negligible.
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