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Suppose the skateboarder shown in the drawing reaches a height of2.30 m above the right side of the semicircular ramp. He then makesan incomplete midair turn and ends up sliding down the right sideof the ramp on his back. When the skateboarder reaches the bottom of the ramp, his speed is 5.90 m/s. The skateboarder's mass is 58.0kg, and the radius of the semicircular ramp is 2.00 m. What is the average frictional force exerted on the skateboarder by theramp?
A -6.0 diopter lens is held 10.0 cm from an ant that is 1.0mm high. What is the height of the image
A runaway, 400-kg wagon enters a cornfield with a velocity of 12 m/s and eventually comes to rest. What work was done on the wagon in kJ
A satellite has a mass of 99 kg and is located at 2.01 106 m above the surface of Earth. obtain the magnitude of the gravitational force on the satellite
a parallel-plate air capacitor of area a20.0cm2 and plate separation d 3.20mm is charged by a battery to a voltage
A jet is circling an airport control tower at a distance of 22.0 km. Find the distance traveled (in meters) by the jet as the observer watches the nose of the jet cross from one side of the moon to the other
an aluminum rod with a square cross section is l.3 m long and 5.2 mm on edge.a what is the resistance between its
a student standing on a train staiton observes that the pitch (frequency) of the train decreases from 888.8 Hz to 862.8 Hz, What is the speed of the train
A wire 4.38m long and 6.00 mm in diameter has a resistance of 15.0mΩ. A potential difference of 28V is applied between the ends. What is the current in the wire? Calculate the resistivity of the wire material.
A 220 g top spinning at 14 rev/s makes an angle of 30° to the vertical and precesses at a rate of 1 rev per 8.0 s. what is the moment of inertia of the top
A charge ?1.3 × 10^ ?5 C is ?xed on the x-axis at 9 m, Calculate the electric potential at the origin
The Hubble Telescope orbits the earth in a near circular orbit of about 585 km above the Earth's surface. find the magnitude of the centripetal acceleration of the satellite
A small, spherical bead of mass 2.90 g is released from rest at t = 0 from a point under the surface of a viscous liquid. The terminal speed is observed to be vT = 1.76 cm/s.\ (a) Find the value of the constant b in the equation = ?b. (b) Find the ti..
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