If the earth warms significantly, the polar ice caps will melt. Water will move from the poles, near the earth’s rotation axis, and will spread out around the globe. In principle, this will change the length of the day. Why? Will the length of the day increase or decrease?

Q: (II) Estimate the kinetic energy of the Earth with respect to the Sun as the sum of two terms, (a)…

A: Given

Q: The diagram shows a spinning ice skater in two different positions. L- lo L= l'o' (a) (b) What…

A: her angular speed does NOT change; conservation of angular momentum (a) An ice skater is spinning on…

Q: The diameters of the main rotor and tail rotor of a single-engine helicopter are 7.55 m and 1.06 m,…

A: Write the given values of this problem. The radius of the main motor=7.552Rmain=3.77 mThe Radius of…

Q: 5. A body consists of a straight circular cone (mass m, height 2 r and bottom radius r ) and a…

A:

Q: Which of the following statements is TRUE? (A) The moment of inertia about an axis parallel to the…

A: (A) Parallel axis theorem: The moment of inertia of a system about any other axis parallel to the…

Q: 2.00 kg and a block of 6.00 kg are connected by a massless string over a pulley in the shape of a…

A:

Q: For this question consider a cylindrical shell that has a radius R = 4.6 m, and a mass M = 4.35 kg.…

A:

Q: A crate is connected to a cable and lowered down from a helicopter as part of a pulley system…

A: The given values are, R=0.2 mMp=20.0 kgm=100.0 kgt=1.0 s

Q: Suppose a 225 kg motorcycle is heading toward a hill at speed of 35 m/s the two wheels weigh 12 kg…

A: Concept: Since, Friction is being neglected thus there will be conservation of Energy. The Equation…

Q: The diameters of the main rotor and tail rotor of a single-engine helicopter are 7.70 m and 1.03 m,…

A: Given data The diameter of the main rotor is: dmain rotor =  7.70 m The diameter of the tail rotor…

Q: increases

A: When the resultant external torque acting on system is zero, the total angular momentum of the…

Q: The diameters of the main rotor and tail rotor of a single-engine helicopter are 7.61 m and 1.04 m,…

A: Given : d1 = 7.61 m d2 = 1.04 m w1 = 456 rev/min = 456(2π/60) = 47.75 rad/s w2 = 4150 rev/min =…

Q: A figure skater stands on one spot on the ice (with negligible friction) and spins around with her…

A: The angular momentum of the figure skater remains the same as the angular momentum is conserved and…

Q: When a rigid object rotates about a fixed axiS, what is true about all the points in the object?…

A: Given that one rigid object is rotating about an axis which is fixed.

Q: (II) A potter’s wheel is rotating around a vertical axis  through its center at a frequency of 1.5…

A: Let L1 denote the angular momentum of the wheel, L2 denote the angular momentum of the wheel after…

Q: -93mv 1 (8.49). In an amusement park ride like a problem we did in class, passengers stand inside of…

A:

Q: The top edge of a thin rectangular metal plate with a mass of 2.80 kg is attached to a horizontal…

A:

Q: The front wheel of a bicycle has a diameter of 50 cm. Approximately, how many times has the front…

A: diameter of front  wheel = 50 cm radius of front wheel = 25 cm = 0.25 m distance traveled = 1 km  =…

Q: A 8.10 kg uniform disk with a radius of 14.3 cm is wrapped with a massless string and is suspending…

A: Draw the schematic diagram of the system.

Q: Approximate a fishing reel to be two solid disks, each of radius 4.8 cm and combined mass 0.87 kg…

A: 1. Given data: Radius of the wheel, R=7 m Mass of the wheel, m=10 kg Angular velocity, ω=1.14 rad/s…

Q: A disk has mass M = 1.0 kg and radius, R = 0.3 m is free to rotate about a fixed axle through its…

A: In the question , given values of  mass of disc , radius , rotation , and  force and we have to find…

Q: The radius of a car tire is 0.2m. The distance moved by the car if the tire makes 100 rotations is O…

A: The radius of a car tire is 0.2m. The distance moved by the car if the tire makes 100 rotations is

Q: Strictly speaking, as more and more skyscrapers are built on the surface of Earth, does the day tend…

A:

Q: When the sum of the external forces and the sum of the external torques on a body are both zero, we…

A: Given :   The sum of the external forces and the sum of the external torques on a body are both…

Q: A bowling ball of radius 8.5 cm is tossed onto a bowling lane with speed 9.0 m/s. The direction of…

A: a. the frictional force acting on the ball is

Q: The radius of a car tire is 0.2m. The distance moved by the car if the tire makes 100 rotations is O…

A: r = 0.2 meter circumference of circle = 2(pi)r = 2 x 3.14x 0.2 m circumference = 1.256 m

Q: A hollow cylinder and solid cylinder, with the same radius, are placed at the top of an incline and…

A:

Q: An orangutan leaps off of a cliff and its body begins to rotate clockwise. If the orangutan then…

A: Solution: We are given that the orangutan leaps off a cliff and then its body begins to rotate…

Q: A bicycle is turned upside down while its owner repairs a flat tire on the rear wheel. A friend…

A: Given: The radius of the front wheel = 0.408 m Height of the drop from the tire = 54.3 cm Height of…

Q: If there were a great migration of people toward the Earth’sequator, the length of the day would(a)…

A: The initial and final angular momentum must be conserved according to the conservation of momentum…

Q: A 5.0 g coin is placed 15 cm from the center of a turntable. The coin has static and kinetic…

A: The expression centrifugal force, F=mω2rF=0.005×(2π)2×0.15F=0.0296N

Q: Approximate a fishing reel to be two solid disks, each of radius 4.8 cm and combined mass 0.87 kg…

A: a) we know that from newtons law of rotationτ = Iα I = MR22τ= Iατ = RFRF = MR22αwhere α is angular…

Q: A figure skater stands on one spot on the ice (assumed frictionless) and spins around with her arms…

A:

Q: Two identical discs are spinning on a vertical rod, at different rotation rates. The bottom disc is…

A:

Q: The diameters of the main rotor and tail rotor of a single-engine helicopter are 7.61 m and 1.06 m,…

A: The speed of the tip of the rotor is given by, v=rω Here, r is the radius of the rotor and ω is the…

Q: 7. A 5.00-kg solid ball of radius 0.250 meters is pressed back against a spring having a spring…

A: Apply the conservation of energy between the launch position and the start of the inclination.

Q: A cube with side length a = 80 cm and made out of concrete ( density of 1.8 · 10 kg/m³ ) should be…

A:

Q: A solid disk rotates in the horizontal plane at an angular velocity of 4.20 × 10-2 rad/s with…

A: Given data: Initial angular velocity (ω1) = 4.20 × 10-2 rad/s Initial moment of inertia (I1) = 0.14…

Q: The diameters of the main rotor and tail rotor of a single-engine helicopter are 7.55 m and 1.01 m,…

A: diameter of main motor, D = 7.55  m , rotational speed = 446 rpm = 46.68 rad/s diameter of tail…

Q: A carousel is 4.0 m in diameter and has a moment of inertia about an axis through its center of mass…

A:

Q: A merry-go-round at an amusement park consists of an outer ring of n inner ring of elephants. eight…

A: We know that the merry-go-round at an amusement park consists of an outer ring of horses and an…

Q: The diameters of the main rotor and tail rotor of a single-engine helicopter are 7.63 m and 1.01 m,…

A:

Q: hyper car's report claims the car can reach 100 km/hr from rest in 2.8 seconds. We will assume that…

A:

Q: An ice skater is rotating with her arms extended. When she pulls in her arms her rate of rotation…

A: The mass plays a crucial role in inertia as inertia depends on mass. But in rotation, inertia…

Q: A potter's wheel is rotating around a vertical axis through its center at a frequency of 1.9 rev/s .…

A: Given: Frequency of rotation of potter’s wheel (fw) = 1.9 rev/s Mass of wheel (M) = 4.5 kg. Diameter…

Q: A solid iron sphere A rolls down an inclined plane, while identical sphere B slides down the plane…

A: