Book edition 1st Edition

Author(s) Paul Peter Urone

Pages 1272 pages

ISBN 9781938168000

Answers without the blur.

Just sign up for free and you're in.

Short Answer

Competitive divers pull their limbs in and curl up their bodies when they do flips. Just before entering the water, they fully extend their limbs to enter straight down. Explain the effect of both actions on their angular velocities. Also explain the effect on their angular momenta.

During flips, the body curls up to increase the angular velocity and just before entering the water, the body stretches to decrease the angular velocity.

See the step by step solution

Step by Step Solution

TABLE OF CONTENTS :

TABLE OF CONTENTS

Step 1: Concept of law of conservation of angular momentum.

The law of conservation of angular momentum states that there will be no change in the angular momentum unless an external torque acts on the object. Angular momentum of a system is conserved as long as there is no external torque acting on the system. Mathematically,

$L = I ω$

Here, L is the angular momentum, I is the moment of inertia, and $ω$ is the angular velocity.

Step 2: Explanation for both the actions on angular velocities and angular momenta.

When the diver pulls their limb in and curl up their bodies during the flip, they gain angular momentum along the center of the mass of the body. The gravitational force that acts on the center of the mass exerts torque on the body and increase the angular velocity. This increased angular velocity increases the rotational kinetic energy and hence it increases the angular momentum.

Just before entering the water, the diver fully stretches its body. By doing so, the angular velocity of the body decreases and the body enters easily into water. With decreased angular velocity, the angular momentum also decreases.

Find Study Materials for

Create Study Materials

Select your language

College Physics (Urone)

Answers without the blur.

Short Answer

Competitive divers pull their limbs in and curl up their bodies when they do flips. Just before entering the water, they fully extend their limbs to enter straight down. Explain the effect of both actions on their angular velocities. Also explain the effect on their angular momenta.

Step by Step Solution

Step 1: Concept of law of conservation of angular momentum.

Step 2: Explanation for both the actions on angular velocities and angular momenta.

Most popular questions for Physics Textbooks

Want to see more solutions like these?

Recommended explanations on Physics Textbooks

Select your language

College Physics (Urone)

Answers without the blur.

Short Answer

Competitive divers pull their limbs in and curl up their bodies when they do flips. Just before entering the water, they fully extend their limbs to enter straight down. Explain the effect of both actions on their angular velocities. Also explain the effect on their angular momenta.

Step by Step Solution

Step 1: Concept of law of conservation of angular momentum.

Step 2: Explanation for both the actions on angular velocities and angular momenta.

Most popular questions for Physics Textbooks

Want to see more solutions like these?

Recommended explanations on Physics Textbooks

Work Energy and Power

Radiation

Astrophysics

Physics of Motion

Scientific Method Physics

Fluids

Torque and Rotational Motion

Nuclear Physics

Fields in Physics

Measurements

Space Physics

Electricity

Physical Quantities and Units

Medical Physics

Electrostatics

Further Mechanics and Thermal Physics

Mechanics and Materials

Engineering Physics

Energy Physics

Force

Particle Model of Matter

Waves Physics

Magnetism

Modern Physics

Atoms and Radioactivity

Dynamics

Electricity and Magnetism

Conservation of Energy and Momentum

Fundamentals of Physics

Kinematics Physics

Circular Motion and Gravitation

Linear Momentum

Rotational Dynamics

Oscillations

Translational Dynamics

Geometrical and Physical Optics

Thermodynamics

Magnetism and Electromagnetic Induction

Electromagnetism

Electric Charge Field and Potential

Turning Points in Physics