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Two blocks of masses 20 kg and 8 kg are connected together by a light string and rest on a frictionless level surface. Attached to the 8 kg mass is another light string, which a person uses to to pull both blocks horizontally. If the two block system accelerates at 0.50 m/s2 what is the tension in the connecting string between the blocks?
A skier is gliding along at 4.72 m/s on horizontal, frictionless snow. He suddenly starts down a 19.2° incline. His speed at the bottom is 27.8 m/s. What is the length of the incline?
A 250-g object attched to a spring oscillates on a frictionless table with a frequency of 4 Hz and an amplitude of 20 cm. Calculate the maximum potential energy of the system
He has a mass of 74.0 kg and his center of gravity is located at a horizontal distance of d1 = 0.730 m from his palms and d2 = 1.10 m from his feet. calculate the forces exerted by the floor on his feet
An insulated container of negligible mass holds 0.200 kg of water and 0.05kg of ice in thermal equilibrium at atmospheric pressure. calculated the specific heat capacity c of heat
A flask is filled with 1.58 L (L = liter) of a liquid at 100 °C. When the liquid is cooled to 13.3 °C, What is the coefficient of volume expansion of the liquid
A chair of weight 70 lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of = 37.0 directed at the angle of 42 below the horizontal and the chair slides along the floor.
A pipe open only at one end has a fundamental frequency of 256 Hz. A second pipe, initially identical to the first pipe, is shortened by cutting off a portion of the open end.
a student pulls a 5kg object along a horizontal surface at a constant speed of 2m/s by a 15N force acting 30 degrees above the horizontal
A converging lens of focal length 0.187 m forms a virtual image of an object. What is the distance between the object and the lens
a hot air balloon is descending at a rate of 2.6 ms when a passenger drops a cell phone.a if the phone is 40 m above
A machine shop grinding wheel accelerates from rest with a constant angular acceleration of 2.3 rad/s^2 for 7.1 s, Find the total number of revolutions turned
A ball is shot from the ground into the air. At a height of 8.6 m, the velocity is observed to be v = (8.1)i + (5.3)j in meters per second (i horizontal, j upward). To what maximum height will the ball rise
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