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A roller coaster at an amusement park has a dip that bottoms out in a vertical circle of radius r. A passenger feels the seat of the car pushing upward on her with a force equivalent to six times her weight as she goes through the dip. If r=23.5 meter, obtain how fast is the roller coaster traveling at the bottom of the dip?
____ m/s
A 1.85m diameter wagon wheel makes one revolution in 3.45s. What is the tangential speed of a point in it's rim
A uniform disk with radius 0.370m and mass 30.5kg rotates in a horizontal plane on a frictionless vertical axle that passes through the center of the disk. What is the resultant linear acceleration of a point on the rim of the disk
The right-side rearview mirror of Mike's car says that objects in the mirror are closer than they appear. Mike decides to do an experiment to determine the focal length of this mirror. What is the focal length of the rearview mirror
In a wire with a 1.67-mm2 cross-sectional area, 8.43 × 1020 electrons flow past any point during 3.87 s. What is the current in the wire
A slingshot consists of a light leather cup, containing astone, that is pulled back against two parallel rubber bands. Ittakes a force of 15 N to stretch either one of these bands 1.0cm.
When a 5.5 cm long pencil is arranged perpendicular to a convex mirror's optical axis at a distance of 29 cm from the mirror, its image is 2.8 cm tall.
A seed shoots out from the pod with the speed of 2.8 m/s but with a direction of motion 30° below the horizontal. What horizontal distance does it cover during its flight
A train is rounding a circular curve whose radius is 2.00 102 m. At one instant, the train has an angular acceleration of 1.50 10-3 rad/s2 and an angular speed of 0.0200 rad/s
a small ball rolls horizontally off the edge of a tabletop of height h. it strikes the floor a distance x horizontally
A proton is passing the origin. The magnetic field at the (x,y,z) position ( 1mm , 0 mm, 0 mm)is 1.0×10?13?^T. what is the direction of the proton
Work of 600 J is done by stirring and insulated beaker containing 100 gm of water? What is the change in temperature of the water
a stores sign with a mass of 20.0 kg and 3.00 m long has its center of gravity at the center of the sign. it is
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