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Assume that the engine of a car with mass m supplies a constantpower P to the wheels to accelerate the car. The car is initially at rest. Ignoring rolling friction and air resistance, (a) Show that the speed of the car is given as a function of time by v = (2Pt/m)^1/2. (b) Show that the acceleration of the car is not constant but is given as a function of time by a = (P/2mt)^1/2. (c) Show that the displacement is given by x-x0 = (8P/9m)^1/2t^3/2.
The tub of a washer goes into its spin cycle, starting from rest and gaining angular speed steadily for 9.00 s, how many revolutions does the tub turn while it is in motion
A tuning fork of unknown frequency is noted to be higher than one marked 512 hz and lower than one marked 1000 hz. You discover resonance points at .11 m and .53 m. Using 347 m/s for speed of sound what is the frequency of the new fork.
Air is trapped above liquid ethyl alcohol in a rigid container. If the air pressure above the liquid is 1.10 atm, determine the pressure in the bulb inside a bubble 4.0 m below the surface of the ethanol.
A light spring of force constant k = 156 N/m rests vertically on the bottom of a large beaker of water. A 5.55-kg block of wood (density = 650 kg/m3) is connected to the spring, and block-spring system is allowed to come to static equilibrium. Wha..
Water at a gauge pressure of 3.8 atm at street level flows into an office building at a speed of 0.45 m/s through a pipe 4.2 cm in diameter.Calculate the flow velocity in such a pipe on the top floor
A boy catches - with bare hands and his arm extended - a 0.16 kg baseball coming directly toward him ar a speed of 25 m/s. what is the average force the boy's hand feel while catching the ball
While partying in Paris, you throw a glass of champagne off of the Eiffel Tower. how high above the ground are you
When the distance is 0.20m the tension is 628 N, horizontal pivot force is 581 N and the vertical pivot force is 839N. What is the mass of the bell
A tuning fork of unknown frequency makes six beats per second with a standard fork of frequency 481.0 Hz. What is the frequency of this fork
A 1.2 -long steel rod with a diameter of 0.50 hangs vertically from the ceiling. An auto engine weighing 4.7 is hung from the rod. By how much does the rod stretch
A racing car accelerates uniformly from 0 to 165 km/hr in 12.00 s. determine the minimum coefficient of friction between the tires and the road
In the amusement park ride known as Magic Mountain Superman, powerful magnets accelerate a car and its riders from rest to49 m/s (around 110 mi/h) in a time of 8.5 s.The mass of the car and riders is 5500 kg. Find the average net force exerted on ..
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