5. Big Ben, the nickname for the clock in Elizabeth Tower (named after the Queen in 2012) in London, has an hour hand 2.70 m long with a mass of 60.0 kg and a minute hand 4.50 m long with a mass of 100 kg. Calculate the total rotational kinetic energy of the two hands about the axis of rotation. (You may model the hands as long, thin rods rotated about one end. Assume the hour and minute hands are rotating at a constant rate of one revolution per 12 hours and 60 minutes, respectively.)

Q: Consider a father pushing a child on a playground merry-go-round. The system has a moment of inertia…

A: Given Moment of inertia = 84.4 kgm2  radius r =1.5 m Torque =375 Nm

Q: A 10 kg ball with a 1.5-meter radius is initially at rest begins to roll and accelerate at a uniform…

A:

Q: A 944 kg car has four 8.33 kg wheels. When the car is moving, what fraction of the total kinetic…

A:

Q: A stone potter's wheel with rotational moment of inertia 2.4 kg m2 is initially at rest. A motor is…

A: Torque applied on the wheel is given by: torque = I*alpha alpha = angular acceleration = torque/I…

Q: 5. A grinder disc of mass 2.0 kg with 8.0 cm radius rotates at 500 rev/min. What is its rotational…

A:

Q: 1. When a pitcher throws a curve ball, the ball is given a fairly rapid spin. Assume a 0.15 kg…

A: Given: The mass of baseball is m=0.15 kg. The radius is r=3.7 cm. The linear speed is v=48 m/s. The…

Q: 7. You exert a force on a friend who is holding a 4.0-m-long rope. Now suppose you exert the same…

A:

Q: A child's jack is three small rods joined at their centers, all at right angles. Pretend the rod's…

A:

Q: A wheel spinning at a constant angular velocity about an axis through its center. Which point on the…

A:

Q: 4. This graph shows the angular velocity of a spinning wheel. How many rotations does the wheel make…

A:

Q: 7. Two discs are initially spinning in opposite directions. The upper disc has rotational inertia of…

A: Write the given values. Consider the counter-clockwise rotation rate of the disc as positive and the…

Q: A baseball pitcher throws the ball in a motion where there is rotation of the forearm about the…

A: Given: The linear velocity of the ball relative to the joint is 17.1 m/s. The distance of the ball…

Q: Calculate the rotational inertia of a meter stick, with mass 0.732 kg, about an axis perpendicular…

A:

Q: 5. In Section 10.4 (Rotational Kinetic Energy) of the OpenStax College Physics textbook, go to…

A: Part (5): Given:The mass of the helicopter is Y = 46.83 kg. The anguar speed is Z = 294.83 rpm. The…

Q: 6) As shown in the figure below, a person pulls on a solid cylindrical wheel initially at rest…

A: Since you have posted a question with a multiple sub parts, we will solve first three sub - parts…

Q: Which do you think would rotate faster (when started from rest), a sphere or a disk? Explain your…

A: The moment of inertia of the sphere is, Isphere=25mr2 The moment of inertia of the disk is,…

Q: 8- The rotational kinetic energy of a disk of radius R=5 cm and mass m-1Kg rotating about an axis…

A: Given The radius of the disk is R=5 cm=5×10-2 m. The mass of the disk is m=1 kg. The angular…

Q: 5. A figure skater jumps into the air completing a one and a half (1.5 turn) revolution axel. The…

A: Given number of turns in 0.5 second is 1.5means 3turns per second.  Angular displacement =3×2πrad So…

Q: A crustacean (Hemisquilla ensigera) rotates its anterior limb to strike a mollusk, intending to…

A: Given, angular velocity, ω = 175 radstime, t= 1.50 ×10-3 smass of the limb, M = 28.0 glength, L =…

Q: Question 3 The mass and the radius of a uniform cylinder are 100 kg and 0.50 m, respectively. It is…

A:

Q: A fan rotates from stillness and reaches an angular velocity of 120 rpm after 20s , then slows down…

A: The calculation for the first 20 s of the motion: From kinematics, the expression for the angular…

Q: The figure gives the speed v versus time t for a 0.739 kg object of radius 2.12 cm that rolls…

A:

Q: 8. A machine part rotates at an angular speed of 0.060 rad/s; its speed is then increased to 2.2…

A: Given:  final angular speed = 2.2 rad/sInitial angular speed = 0.060 rad/sAngular acceleration =…

Q: An ice skater of mass 75 kg and height 1.7 m is spinning with his arms stretched wide at a frequency…

A:

Q: small object with a mass of 0.75 kg is suspended from the free end of a 1.5 m long, negligible and…

A: Rotation kinetic energy =(1/2)Iw2

Q: 14. A sphere with the same mass and radius as the original cylinder, but a smaller rotational…

A: In this attachment the first question is not complete so we will solve the second one. Please…

Q: 52. A helicopter has two blades (see Figure 8.11); each blade has a mass of 240 kg and can be…

A:

Q: The turntable of an old record player has two readings: 33 rpm and 45 rpm. Suppose that the…

A: The angular velocity of turntable of an old record player has two readings : 33 rpm and 45 rpm

Q: While riding on a carnival Ferris wheel, Sam Nasty horses around and climbs out of his chair and…

A:

Q: Two wheels A and B in the figure are connected by a belt that does not slip. The radius of B is 5.39…

A:

Q: 2. What is the rotational inertia of a solid ball 0.20 in diameter and has a mass of 10 kg rotating…

A: Given: The mass of the solid sphere is 10 kg. The diameter of the sphere is 0.2 in.

Q: A 2.13-kg solid sphere (radius 0.135 m) is released from rest at the top of a ramp and allowed to…

A: At the top of the incline plane, the sphere have only the potential energy, then the total kinetic…

Q: ) A playground merry-go-round with a radius of 1.53 m and a rotational inertia of 103.3 kgm2 is…

A: r=1.53 mI=103.3 kg m2m=30.3 kgrevolutions=2

Q: 5. A grinder disc of mass 2.0 kg with 8.0 cm radius rotates at 500 rev/min. What is its rotational…

A: The given data are: m=2 kgr=8 cm=0.08 mN=500 rev/min Here, m, r, and N are the mass, radius, and…

Q: Angular Acceleration and Torque. Question #2

A:

Q: Jimmothy has a flywheel. It rotates about its central axis. It starts from rest and accelerates…

A:

Q: NASA physicians need to know whether the contents of astronauts' skulls (brain, eyes, eardrums,…

A:

Q: 1) When I was spinning on my chair with my arms out I had a rotational inertia of 15 kg m and an…

A:

Q: Problem #4–The two blocks in the figure are connected by a massless rope that passes over a pulley.…

A: