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A popular carnival ride consists of a large, round room that rotates fast enough that any person standing against the wall will be stuck there, even as the floor is dropped away from their feet. The coefficient of static friction between the person and the wall is ?s, and the radius of the cylinder is R. a) Find an equation for the minimum period of rotation, T, needed to keep the people in place on the wall. This equation will include ?s, R, g and ?. b) Solve for T if R = 4.00 m and ?s = 0.60. What is the room's angular speed in rpm?
A bucket of mass 2.00 kg is whirled in a vertical circle of radius 1.10 m. At the lowest point of its motion the tension in the rope supporting the bucket is 25.0 N. Find the speed of the bucket
A mortar* crew is positioned near the top of a steep hill. Enemy forces are charging up the hill and it is necessary for the crew to spring into action. How long will the mortar shell remain in the air
The tires of a car make 62 revolutions as the car reduces its speed uniformly from 90km/h to 40km/h . The tires have a diameter of 0.86m. What was the angular acceleration of the tires
A 1500 kg car is approaching the intersection at 11 m/s. He is 40 m away from the intersection. Find the minimum acceleration needed for the car to come to rest
What is the speed of the bullet.
An orbiting satellite stays over a certain spot on the equator of (rotating) Earth. What is the altitude (in km) of the orbit (called a geosynchronous orbit)?
A horse draws a sled horizontally across a snow-covered field. The coefficient of friction between the sled and the snow is 0.175, and the mass of the sled, what is the power needed to accomplish this
A centrifuge is a device in which a small container of material is rotated at a high speed on a circular path. How many revolutions per minute is the sample making
A projectile is launched straight up at 141m/s. How fast is it moving at the top of its trajectory? Presume it is launched upward at 45 degrees above the horizontal plane. How fast is it moving at the top of its curved trajectory.
A irregular piece of metal has a dry mass of 5.7 kg. Once it is submerged it has an apparent mass of 2.4 kg. What is the density of the piece of metal
Transvers waves: Speed of wave on streatched string. Two steel wires are stretched with the same tension. The first wire has a diameter of 0.610 mm and the second wire has a diameter of 0.910 mm
Under the influence of its drive force, a snowmobile is moving at a constant velocity along a horizontal patch of snow. compute the distance in which the snowmobile coasts to a halt
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