r momentum
Q: You often hold your hands away from you to keep from tipping over. This is because:
A: b) You’re decreasing your rotational inertia.
Q: A solid disk of radius R = 2m and mass 10 kg is fixed by its center to a flat surface. A force of 10…
A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for…
Q: The moment of inertia is a) inversely proportional to the square of the angular velocity b) not…
A: An object's resistance to rotational motion about a given axis is expressed by its moment of inertia…
Q: An optical disc drive in your computer is spinning at 10,000 rpm (1045 rad/s). It decelerates to…
A: Initial angular velocity of the disk, ωi=1045 rad/s Final angular velocity of the disk, ωf=0…
Q: A basketball and a golf ball are initially at rest at the top of a ramp. The basketball takes longer…
A:
Q: Algebraic manipulation. The table below lists four uniform objects, each with the same radius but…
A: Consider the radius of each object is equal to R.
Q: A hoop of mass 4 kg and radius 0.1 m is rolling without slipping. It has a translational speed of v=…
A:
Q: alculate the rotational inertia of a meter stick, with mass 0.735 kg, about an axis perpendicular to…
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Q: A bicycle wheel has a radius r = 0.21 m and rotates at a constant frequency of f = 51 rev/min. r =…
A: The angular frequency, ω = 51rev/min = 5.34rad/s. The time period of rotation of the wheel is
Q: A spherical ball with mass 0.2 kg and radius 0.1 meters laying on a table. It is hit by a…
A: a) The angular acceleration is, b) The required moment of inertia,
Q: A baseball has a mass of 0.15 kg and radius 3.7 cm. In a baseball game, a pitcher throws the ball…
A:
Q: 8. A spherical bowling ball with a mass of 5.3 kg and radius of 10.1 cm rolls down an incline from a…
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Q: A wheel starts at rest, and has an angular acceleration, α, of 4 rad/s2. Through what angle does it…
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Q: a) What happens to an object's moment of intertia about the axis of rotation as it moves outward…
A: Given, when object moves outward from the center of a rotating disk then what will effects on the…
Q: The Earth spins on its axis and also orbits around the Sun. For this problem use the following…
A: a. Rotational Kinetic Energy of the Earth about its axisThe rotational kinetic energy of an object…
Q: 10) A figure skater wants to increase her rotational speed by a factor of 3. a) By what factor…
A: There is no net torque on figure skater(angular acceleration = 0)
Q: A m = 2kg ring has a radius of r = 0.5m. The moment of inertia of a ring is I = m r2. The ring has…
A: When a rigid body rolls without slipping on a surface, it has two kinds of kinetic energies:…
Q: A solid sphere has a larger rotational inertia than a solid cylinder, they have the same mass and…
A: For translational kinetic energy:K=12mv2For rotational kinetic energy:K=12Iω2Here, we can see…
Q: a) Which of these cannot tell you the angular velocity of a wheel (by itself)? A) "The wheel spins…
A: Since you have asked multiple questions, we will solve the first question for you. If you want any…
Q: An object of mass 1.5 kg does rotational motion. Its angular velocity is 30 rpm and the radius of…
A: Kinetic energy of the object in rotational motion Krot=12Iω2=12mr2ω2
Q: A neutron star of mass 2 x 100 kg and radius 11.1 km rotates with a period of 0.02 seconds. What is…
A: The moment of inertia here (for a disk) can be given by I=25MR2 ...... (I) The…
Q: 8) The pulley has a mass of 1.2 kg and a radius of 8 cm. It has the shape of a disk. Find the…
A: The masses are 3kg and 12kg Radius of the pulley is 8cm
Q: A solid sphere of mass 2.0 kg and radius 0.010 m rolls with a speed of 16 m/s. How high up an…
A: Given data The mass of the solid sphere is given as m = 2 kg. The radius of the roll is given as r…
Q: A person of mass 78 kg stands at the center of a rotating merry-go-round platform of radius 2.9 m…
A: Given: The mass of the person is 78 kg. The moment of inertia of the merry-go-round is 840 kg.m2.…
Q: Calculate rotational kinetic energy.
A:
Q: An ice skater, whose rotational inertia is I = 4 kg·m2 with her arms close to her body, is spinning…
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A solid sphere is rotating in free space. If the radius of the sphere is increased keeping mass same, which one of the following will not be affected?
a) Moment of inertia
b)
c)
d) Rotational kinetic energy
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Solved in 2 steps
- a) Convert the following angles from degrees to radians: 15°, 35°, 80°, 95°, 180°b) Convert the following angles from radians to degrees: 0, π/6, 1.2π, 3, 6c) A propeller blade with a diameter of 5 m has an initial angular velocity of 42 rad/s and a constant angular acceleration of -15 rad/s2. What is the angular velocity after 5 revolutions? How much time does it take to complete these 5 revolutions?q4A rotating solid sphere, (mass = 1kg, radius = 25 cm) starts to spin from rest with a constant angular acceleration of a =1.5 rad / s². After 5s, what is: • The angular velocity of the sphere • The number of rotations (please include fractional answers) The rotational kinetic energy of the sphere if I =MR
- A string is wound around the rim of a uniform disc that is pivoted to rotate without friction about a fixed axis through if center. The mass of the disk is 5 kg with a radius of 45 cm the string I’d pulled with 15 n of force . What is it’s angular velocity after 7 seconds1) An object with equal length of each part and uniform mass density is rotated about an axle, which may be in positions A, B, C, or D. Rank the object's rotational inertia from smallest to largest with respect to the axle positions. Please explain, why? AA solid sphere is rolling on a surface. What fraction of its total kinetic energy is in the form of rotational kinetic energy about the center of mass? Number i Units
- 4 3. Rotational Kinematics. Consider a rotating wheel of radius 3 m and mass 5 kg that requires 4 s to complete 54 revolutions. Its angular speed at the end of 4 s is 100 rad/s. Do the following: a) Find the constant angular acceleration of the wheel. b) Find the tangential acceleration of the wheel for a point 1m from the center and for one that is 3 m from the center. c) Find the centripetal acceleration of a point on the edge off the wheel 3 m from center. d) Find the total acceleration of a point on the edge of the wheel 3 m from the center.Two people start at the same place and walk around a circular lake in opposite directions. One has an angular speed of 1.89 x 10-3 rad/s, while the other has an angular speed of 6.64 x 10-3 rad/s. How long will it be before they meet? Number i Start Units 0₂ ---- End