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A sled after a final push moves at velocity of 5.0i m/s. However, after 8.0 s later the sled comes to rest. If the mass of the sled is 40 kg, determine the magnitude of the average friction force acting on the sled during this interval?
a i use the huygens principle to explain how plane parallel wavefronts are diffracted at a single aperture.ii use the
q1.an underwater diver sees the sun 50 degrees above horizontal. how high is the sun above the horizon to a fisherman
A racetrack has the shape of an inverted cone, as the drawing shows. On this surface the cars race in circles that are parallel to the ground, and the surface is at an angle = 40°. For a speed of 35 m/s, at what value of the distance d should a drive..
The position of a 2.0 kg mass is given by x = (2t^3 - 3t^2) m, where t is in seconds. What is the net horizontal force on the mass
An AC generator consists of 8 turns of wire in a coil or loop, the cross-sectional area of the loop is A=0.09 m2, by a total resistance of 12Ω. The loop is rotating in a magnetic field B=0.5T at a constant rate of 60Hz. Discover the maximum EMF and c..
A wheel 90.0 cm in diameter accelerates uniformly from 235 rpm to 385 rpm in 6s. How far will a point on the edge of the wheel have travelled in this time.
The radii of curvature of the surfaces of a thin converging meniscus lens are R1= 12.0 cm and R2 = 28.0 cm, Compute the position and size of the image of an object in the form of an arrow 5.00 mm tall, perpendicular to the lens axis
A man is doing push-ups. He has a mass of 68 kg and his center of gravity is located at a horizontal distance of 0.70 m from his palms and 1.00 m from his feet. Find the forces exerted by the floor on his palms and feet
when the car you are riding in stops suddenly heavy objects move toward the front of the car. why does a helium-filled
A galvanometer with a coil resistance of 14.1 is used with a shunt resistor to make a nondigital ammeter that has an equivalent resistance of 0.755. Find the full-scale current of the galvanometer
The plates of a capacitor are separated by a distance of 11mm. Each plate contains a charge of 19 uC. The electric field between the plates is 640 V/m. What is the capacitance of the capacitor
A man is traveling on a bicycle at 14 m/s along a straight road that runs parallel to several railroad tracks. He hears the whistle of a train that is behind him. The frequency emitted with the train is840 Hz, but the frequency the man hears is 778 H..
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