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A wooden block with mass 1.05 is placed against a compressed spring at the bottom of a slope inclined at an angle of 31.0 (point ). When the spring is released, it projects the block up the incline. At point , a distance of 6.50 up the incline from , the block is moving up the incline at a speed of 5.70 and is no longer in contact with the spring. The coefficient of kinetic friction between the block and incline is = 0.40. The mass of the spring is negligible. Calculate the amount of potential energy that was initially stored in the spring. Take free fall acceleration to be 9.80 .
A wooden raft has a mass of 59 kg. When empty it floats in water (density 1000 kg/m3) with 59 percent of its volume submerged. What mass of sand can be put on raft without it sinking.
A boat with a horizontal tow rope pulls a water skier. how much work does the rope do on the skier during a forward displacement of 310
When a moving car of small mass collides with the stationary car of large mass, after the collision
When the tension in a cord is 77.4 N, the wave speed is 132 m/s. What is the linear mass density of the cord
A spacecraft flies in the horizontal direction at a speed of v=0.980c, What is the slope angle to an astronaut on the spacecraft
Two hockey players strike a puck of mass 0.169 kg with their sticks simultaneously, exerting forces of 1.25 103 N, directed west, and 9.80 102 N, Find the instantaneous acceleration of the puck
A rectangular loop is 1.2 m wide and 0.80 m tall and carries 0.50 A of current clockwise. Find the net force and torque on the rectangular loop
find out where the coyote lands in the canyon.
Two identical conducting spheres, fixed in place, attract each other with an electrostatic force of 0.103 N, determine the positive charge in coulombs on the other
A model-train transformer plugs into 120-V ac and draws 0.41A while supplying 7.8A to the train. Is the transformer step-up or step-down
A transformer has 330 primary turns and 1340 secondary turns. The input voltage is 120 V the output current is 15 A. What are the output voltage and input current
A circular-motion addict of mass 95 kg rides a Ferris wheel around in a vertical circle of radius 10 m at a constant speed of 6.4 m/s. What is the magnitude of the normal force on the addict from the seat when both go through the highest point of t..
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