A В Figure 8.21 (Quick Quiz 8.3)

Q: A force of 10 N is applied to the end of a 20-centimeter long wrench. How much torque is produced?…

A: Given data:  Force (F) = 10 N Distance (r) = 20 cm = 0.20 m Required: Torque (τ)

Q: Jupiter orbits the sun with a speed of 2079 m/s at an average distance of 71,398,000 m. How much…

A:

Q: A windmill has an initial angular momentum of 8500 kg # m2>s.The wind picks up, and 5.86 s later…

A:

Q: What is the angular momentum of an 8766 kg helicopter with a rotor radius of 7.6 m and a velocity of…

A:

Q: How could you use simple equipment such as balls and string to study the changes in angular momentum…

A:

Q: A youngster who has entered a soapbox derby (in which 4-wheel unpowered vehicles roll from rest down…

A: As the moment of inertia is inversely proportional to the rotational speed, decrease in moment of…

Q: As the rope of a tethered ball winds around a pole, what happens to the angular velocity of the…

A: The expression for the angular momentum is, Here, ω is the angular velocity of a ball, and I is the…

Q: A merry-go-round is spinning at a rate of 4.0 revolutions per minute. Cora is sitting 0.5 m from the…

A: 1) rotational speed of the two children are equal because both of them are sitting on the same merry…

Q: The axis of Earth makes a 23.5° angle with a direction perpendicular to the plane of Earth’s orbit.…

A:

Q: What data could you collect to study the change in angular velocity when two people push a…

A: To find:  What data could you collect to study the change in angular velocity when two people push…

Q: A dentist’s drill starts from rest. After 4.28 s of constant angular acceleration it turns at a rate…

A:

Q: As a figures skater draws her arms closer to her body while spinning, she decreases her. angular…

A: Angular momentum  L=Iω I-rotational inertia ω-Angular velocity

Q: A rotating fan starts at rest and accelerates at 206 rad/s2 for 2.6 seconds. Calculate the final…

A: Initial angular velocity = 0 radsectime (t) = 2.6 seconds Angular acceleration (α) = 206 rads2

Q: A wheel is attached directly to the shaft of a motor. When the motor applies a constant torque of…

A: Dear student The relation between Torque, Angular acceleration and Moment of Inertia is given as :…

Q: Find the rotational inertia of the following masses with respect to the y-axis: m1=1.0,…

A: If the perpendicular distance of  mass m from the axis of rotation is r then moment of inertia or…

Q: A figure skater goes into a spin, keeping her arms at her sides. When she extends her arms: A her…

A: Given statement : A figure skater goes into spin, keeping her arms at her sides

Q: Flamingos are frequently seen standing on one leg with the other lifted. Is rotational inertia…

A:

Q: Rank the resulting angular accelerations for the the object from highest to lowest.

A: The angular acceleration of the given objects can be found as, Here, I, F, R, α, and τ represent…

Q: A 250 g , 21-cm-diameter plastic disk is spun on an axle through its center by an electric motor.…

A: Given that:- Mass of disc=m=250gm

Q: 13. After the cylinder leaves the table, but before it lands, how do the rotational kinetic energy…

A: In this question we have to answer whether Rotational Kinetic Energy and Translational Kinetic…

Q: (II) (a) What is the angular momentum of a figure skaterspinning at 3.0 rev/s with arms in close to…

A:

Q: A child is pushing a merry-go-round. The angle through which the merry-go-round has turned varies…

A:

Q: An electric fan spinning with an angular speed of 12 rad/srad/s has a kinetic energy of 4.1 J .

A: Given: angular speed ω =12 rad/s kinetic energy K =4.1 J

Q: The total kinetic energy of a baseball thrown with a spinning motion is a function of: Choose A. its…

A: Given: The baseball is thrown with a spinning motion.   Asked: Total kinetic is function of which…

Q: ne distante i aveleu vy the Dike.[14.9 M] Given that the bicycles' wheels are 76 cm in diameter. 11)…

A: Step 1The given quantities are

Q: A student sits on a freely rotating stool holding two dumbbells, each of mass 3.09 kg (see figure…

A: Given data: Mass of dumbbell is, m=3.09 kg When his arms are extended horizontally, the dumbbells…

Q: In a stunt that his friends say is crazy, a physics student jumps off a high diving platform and…

A: Number of revolutions (n) = 1.5height of platform above the swimming pool (h) = 12 m

Q: Suppose there is a 20 m stick that is pivoting about its center of mass at 10 m. On the right side…

A: length of stick = 20 m pivot point = midpoint of the stick = 10 m first weight (w) = 10 N position…

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

A:

Q: A merry-go-round with a moment of inertia of 880kg⋅m2 experiences a force of 74.5N applied parallel…

A: Given data: Moment of inertia of merry-go-round is, I = 880 kg⋅m2 Force is applied parallel to edge…

Q: hat is the angular momentum of a .4kg hula-hoop with a diameter of 1.2m while it rotates at 7 r/s?

A: Given data as per question mass= .4kg diameter  =  1.2m

Q: The platform shown in the figure below (The Merry-Go-Round) has a mass of M- 100 kg and radius R 2.0…

A: Given,

Q: Three children are riding on the edge of a merry-go-round that is 162 kg, has a 1.60 m radius, and…

A:

Q: The cars in a soapbox derby have no engines; they simplycoast downhill. Which of the following…

A: Rotational Energy of any car can be given as,

Q: You reach your straight outstretched arm, 0.78 m from your shoulder, to grab the cornbread dish from…

A: So the torque exerted on the arm at this position is   21.78 N.m.

Q: . If a trapeze artist rotates twice each second while sailing through the air and contracts to…

A: Given rotational velocity ω = 2 rev/s with Rotational Inertia I and then the trapeze artist…

Q: The puck in Figure P8.63 has a mass of 0.120 kg. Its original distance from the center of rotation…

A:

Q: You're feeling particularly lazy and decide to open a door by firing a bullet at it. The door has a…

A: Here, the initial angular momentum of the system about the hinge is equal to the initial angular…

Q: A figure skater can increase her spin rotation rate from an initial rate of 1.0 rev every 1.6 s to a…

A: Given Initial rate of rotation n1=1.0 rev in 1.6 s                                n1=0.625…

Q: Suppose you start an antique car by exerting a force of 325 N on the starting crank for 0.275 s.…

A: Given The force exerted on starting crank = 325 N Time for which force is applied = 0.275 s The…

Q: This states that the torque exerted on an object is equal to the product of the object's moment of…

A: When a torque is applied to an object, then the object starts rotating with an angular acceleration,…

Q: Discover the relationships between angular acceleration, moment ofinertia, angular momentum and…

A:

Q: A 5kg sphere with a radius of 10 cm is spinning at an angular of 15rads/s. What is the rotational…

A:

Q: A 500-g wheel that has a moment of inertia of 0.015 kg · m2 is initially turning at 30 rev/s. It…

A: