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In a large centrifuge used for training pilots and astronauts, a small chamber is fixed at the end of a rigid arm that rotates in a horizontal circle. A trainee riding in the chamber of a centrifuge rotating with a constant angular speed of 2.1 rad/s experiences a centripetal acceleration of 3.2 times the acceleration due to gravity. In a second training exercise, the centrifuge speeds up from rest with a constant angular acceleration. When the centrifuge reaches an angular speed of 2.1 rad/s, the trainee experiences a total acceleration equal to 4.0 times the acceleration due to gravity.
(a) How long is the arm of the centrifuge?
(b) What is the angular acceleration in the second training exercise?
Two point charges of equal magnitude are 7.3cm apart. At the midpoint of the line connecting them, their combined electric field has a magnitude of 40N/C . Find the magnitude of the charges.
A beetle 4.80mm is examined with magnifier of focal length 10.3 cm. If the observer's eye is relaxed while using the magnifier, what is the apparent length of the beetle
A long thin rod lies along the x-axis. One end is at x=2.00 m and the other at x=4.00 m. Calculate mass of the rod
find out the magnitude of the gravitational force exerted by one mass.
A fireman 52 m away from a burning building directs a stream of water from a ground-level fire hose at an angle of 32° above the horizontal.
A 2000 kg car is traveling at a constant 15.0 m/s down a long mountain grade of 2.0%. The mountain road is 5.0 km long. What is the increase in the temperature of the brakes
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A massless string is wrapped around a solid disk of mass m_1 and tied to a block of mass m_2. The disk is free to rotate on a frictionless horizontal axle.
A uniform wooden plank of mass 15kg and total length 10m rests on two supports. Find the forces of the two supports on the plank
A very hard rubber ball (m = 0.7 kg) is falling vertically at 9 m/s just before it bounces on the floor. find the average force exerted by the floor on the ball
part 1 what do you think of socrates conclusion that no person knowingly does evil and therefore all evil is ignorance?
Three blocks, each of mass 12 kg are on the frictionless table. A hand pushes on the left most box (A) such that the three boxes accelerate in the positive horizontal direction as shown at a rate of a = 1.1 m/s2. What is the net horizontal force on b..
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