of 8

Kinetic energy

Published on: Mar 3, 2016
Published in: Technology      Economy & Finance

Transcripts - Kinetic energy

• 1. KINETIC ENERGY<br />www.mstfdemirdag.com<br />
• 2. KINETIC ENERGY<br />The capacity of the physical system to do work is called energy.<br />Kinetic energy is associated with an object in motion.<br />
• 3. The kinetic energy of an object with mass m and speed v, when treated as a particle, is given by the expression shown as<br />Kinetic energy is a scalar quantity, and the SI unit for kinetic energy (and all other forms of energy) is the joule.<br />
• 4. P R O B L E M<br />A 7 kg bowling ball moves at 3 m/s. How fast must a 2.45 g table tennis ball move in order to have the same kinetic energy as the bowling ball? Is this speed reasonable for a table-tennis ball in play?<br />
• 5. P R O B L E M<br />What is the speed of a 0.145 kg baseball if its kinetic energy is 109 J?<br />
• 6. P R O B L E M<br />A car has a kinetic energy of 4.32x105J when traveling at a speed of 23 m/s. What is its mass?<br />
• 7. Work–Kinetic Energy Theorem<br />The net work done by all the forces acting on an object is equal to the change in the object’s kinetic energy.<br />
• 8. P R O B L E M<br />On a frozen pond, a person kicks a 10 kg sled, giving it an initial speed of 2.2 m/s. How far does the sled move if the coefficient of kinetic friction between the sled and the ice is 0.1?<br />