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A block of mass slides on a frictionless tabletop. It is connected to a string that passes over a pulley and suspends a mass (Figure 1) . Suppose that the mass on the frictionless tabletop has the value = 2.30 kg Find the value of that gives an acceleration of 2.85 m/s^2 What is the corresponding tension, , in the string? Calculate the ratio T/m2gand show that it is less than 1, as expected
A football kicked off at an angle 20° from the ground reaches a maximum height of 4.7 m. What is the initial velocity of the kick.
Calculate the earth’s radiative temperature (TE) for an albedo value of 0.27, 0.30 and 0.33. Then estimate the surface temperature using a reasonable estimate of the temperature increase due to the greenhouse effect. Summarize the scientifically vali..
A particle with a charge of -1.5uC and a mass of 2.5x10-6 kg is released from rest at point A and accelerates toward point B, arriving there with a speed of 42 m/s. The only force acting on the particle is the electric force. (a) Which point is at..
A batted baseball leaves the bat at an angle of 30.0^\circ above the horizontal and is caught by an outfielder 360 {\rm ft} from home plate at the same height from which it left the bat
During 9.73 seconds a motorcyclist changes his velocity from v1,x = -35.5 m/s and v1,y = 12.5 m/s to v2,x =-21.1 m/s and v2,y = 27.5 m/s. Find the components of the motorcycle\'s average acceleration during this process, aav,x and aav,y.
A person of mass 73kg stands at the center of a rotating merry-go-round platform of radius 3.5m and moment of inertia 950kg kg m^2. Calculate the rotational kinetic energy of the system of platform plus person after the person's walk
An aluminum cup of mass 200 g contains 800 g of water in thermal equlibrium at 80.0c. the combination of cup and water is cooled unformly so that temperature decreases by 1.50c per minute. at what rate is energy being removed by heat.
A hoop and a disk, both of 0.68- m radius and 4.0- kg mass, are released from the top of an inclined plane 2.6 m high and 7.7 m long. What is the speed of the disk
A block is dropped onto a spring with k = 33 N/m. The block has a speed of 3.4 m/s just before it strikes the spring. what is the mass of the block
The supersonic aircraft Concorde has a length of 63.0 m when sitting on the ground on a typical day when the temperature is 15.0 C . The Concorde is primarily made of aluminum. In flight at twice the speed of sound, friction with the air warms the Co..
A block with mass of 4.52 kg is attached to a horizontal spring with spring constant k = 3.59 102 N/m, Find the speed of the block at the equilibrium point
A 50 gallon buoy is tied to the bottom of a still lake by a rope. 26% of its volume is below water. What is the buoyant force on the buoy
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