___3. An ice skater spins with arms fully extended. If she pulls her arms closer to her body then                (a) the kinetic energy increases                (b) the moment of inertia decreases                (c) the angular momentum remains constant                (d) all of these _____10. A wooden ball is tied by a light string to a rod. The ball is then rotated with the constant angular speed. What happens to its linear speed when the length of the string is doubled? a) doubled       b) reduced by half          c) tripled         d) remains the same

Q: A basketball player jumps from a distance of 6m as shown in the figure and throws the ball as a…

A: Given data: Jumping distance is, x=6 m. Angle of projection is, θ=60∘

Q: a) Fill in the blanks with the phrase a greater, the phrase a smaller, the phrase fthe same, or the…

A: concept used: moment of inertia of a object of mass m and at distance R from axis of rotation is…

Q: A wheel is rotating at an angular speed of 2.0 radians/s. How much torque is needed to accelerate it…

A: According to the rotational kinematics equation, the angular acceleration of the wheel is,…

Q: Newton's Second Law

A: 1).The lenses do not fall of, since according to an external observer both the person and the lenses…

Q: As a drill bit accelerates from rest to a constant rotational speed of 50.0 rad/s, it rotates…

A: Given that Initial rotational speed ω0 = 0 ( in rest) Final rotational speed ω = 50 rad/s Angular…

Q: An automatic dryer spins wet clothes at an angular speed of 4.5 rad/s. Starting from rest, the dryer…

A:

Q: An ice skater starts to spin with her arms outstretched. She then gently brings her arms in, and…

A: It states that when no external torque applied to the body, its angular momentum remains constant.…

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: A child raises her arms to balance on a beam.  The action makes it easier for her to balance because…

A: The moment of inertia of a child represents how much that child can resist the rotation. The moment…

Q: A spin bike is an indoor bike that is designed to duplicate the feeling of regular road cycling. A…

A: Given: The mass of the disk is m=12.5 kg. The radius of the disk is r-0.23 m. The mass of the ring…

Q: Every summer, your family goes to Callaway Gardens to see the acrobats in the Flying High Circus.…

A: Conservation of angular momentum: The angular momentum of a system is conserved if there is no net…

Q: In the following figure, we have a disk that has a force of 9.0 N. applied. The diameter of the disk…

A:

Q: A small fan has blades that have a radius of 0.0600m. When the fan is turned on, the tips of the…

A: Write the expression for the angular acceleration. Here, a represents the tangential acceleration…

Q: Q10: A disc whose moment of inertia is worth 1.27 kg.m² rotates with an angular velocity of 824 rpm…

A: Solution: The moment of inertia of the two discs is 1.27 kgm2 and 4.85 kg m2 respectively. The lower…

Q: Consider a 150g puck on a string moving in a 1m radius circle on an air hockey table (no friction)…

A: Solution:

Q: The angular speed of a rotating disk is given by the equation: o = (2rad/s) + (3rad/s2)t What is the…

A: Given data: Angular velocity as function of time  ω = (2rad/s) + (3rad/s2)t Required: Angular…

Q: Use Newton's Second Law () to solve for the mass of the apple. Explain how you used Newton's Second…

A: Given:- M= mass of disk= 2.776 kg Let m= mass of the apple

Q: And ice dancer with her arm stretch out, starts into a spin with an angular velocity of 1.8 rad/S…

A: Given data: The initial angular velocity is ω1=1.8 rad/s The initial moment of inertia is I1=2.41…

Q: An object starts from rest and over a time T it reaches an angular speed of 10 rad/s by being…

A:

Q: The tires on a car have a diameter of 0.70 m. If the car moves in a straight line with a speed of…

A:

Q: Question 25 If the skater has the same angular momentum during the following spin positions, what is…

A: The angular momentum of a rotating object is given as L=IωI is the moment of inertiaω is the angular…

Q: On the figure, blocks A and B are connected by a string that loops around the wheel C. Blocks A and…

A:

Q: A turntable initially has an angular velocity of 4.51 rad/s. If the undergoes uniform angular…

A:

Q: A disk starts to rotate about its central axis from rest and accelerates with constant angular…

A: ωi=Initial angular velocity=6 rev/sθ=Angular displacement=40 revωf=Final angular velocity=14…

Q: 3. A 3.0 kg particle is moving at a constant speed of 4.0 m/s along the direction of i = î + 2ĵ .…

A:

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: A thin rod (mass 240 g) capable of rotation about a vertical axis passing through its centre has two…

A: In the first case, the contribution of beads (each of mass m) to the M.I. of the system is nil…

Q: An ice skater is spinning about a vertical axis with arms fully extended. If the arms are pull in…

A:

Q: A figure skater performs a twisting jump. She rotates around her longitudinal axis 2 times in 0.65…

A: Given data:  Angular displacement (Δθ) = 2 rev Time (t) = 0.65 s Required: The average angular…

Q: A wheel with a radius of 12 cm rotates through 2.5 radians while accelerating from 1.2 rad/s to 6.2…

A:

Q: Problem 5. Carousel that's turning A carousel has two lanes of horses: an outer lane of radius 5.36…

A:

Q: A disk at rest experiences a constant angular acceleration for t = 35 s, at the end of which it is…

A:

Q: A diver comes off a board with arms straight up and legs straight down, giving her a moment of…

A:

Q: An object has a moment of inertia of 10kg-m2 and is rotating at 6.0rev/s. The object expands, so the…

A: Given: In this question, the given values are, The given initial moment of inertia of an object,…