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In the pulley system shown the two upper pulleys are welded together to form one unit the cable is wrapped around the smaller pulley with the end secured to the pully (no slip) . Determine the upward acceleration of B if A has a downward acceleration 0f 2 ft/sec.
The length of the road up the hill is 347 m. Illustrate what should be the magnitude of F, so that the net work done by all the forces acting on the car is 182 kJ?
two ships a and b leave port at the same time. ship a travels northwest at 20 knots and ship b travels at 28 knots in a
A transformer has 280 turns in the primary and 110 turns in the secondary. by what factor does it change the voltage
At what horizontal velocity would a satellite have to be launched from the top of Mt. Everest to be placed in a circular orbit around the Earth and what is the period of rotation?
A rifle is aimed at a target that is 55m away. The bullethits the target 1.5cm below the aim point. What was the bullet's flight time? What was the bullets speed as it left the barrel?
A 5.0 megawatt windmill has three 45 m-long blades that can be approximately viewed as straight rods. If the rotational speed of the rods is 6 rpm, what is the mass of each rod
A thermos contains 141 cm3 of coffee at 92.9 °C. To cool the coffee, you drop two 10.4-g ice cubes into the thermos. What is the final temperature of the coffee
A piece of aluminum has density 2.70g/cm 3 and mass775 g. The aluminum is submerged in a container of oil of density 0.650 g/cm3.How much oil does the metal displace? A solid rock, suspended in air by a spring scale, has a gauged mass of 9.0 kg. Whe..
A 340-N sphere 0.20 m in radius rolls without slipping 6.0 m down a ramp that is inclined at 28° with the horizontal. What is the angular speed of the sphere
A 70.0kg man jumps 1.00 m down onto a concrete walkway. Hisdownward motion stops in 0.0200 seconds. If he forgets tobend his knees, what force is transmitted to his leg bones
Helium has the special property that its internal energy is directly proportional to its absolute temperature. Think a flask of helium by a temperature of 20°C. If it is heated until it has five times the internal energy, what will its temperature be..
A jogger accelerates from rest to 2.40 m/s in 3.44 s. A car accelerates from 18.8 to 36.5 m/s also in 3.44 s. Find the magnitude of the acceleration of the jogger
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