Download presentation

Presentation is loading. Please wait.

Published byScott Perkins Modified over 2 years ago

1
Energy

2
A. Energy Definition The ability to do work.

3
What is Work?

4
B. Two Types of Energy a. Kinetic Energy- the energy an object has due to its motion. b. Potential Energy- energy that is stored in an object due to its position. Example: a rolling ball. Example: a bow and arrow. Example: a battery.

5
Identify one form of potential energy and one form of kinetic energy.

6
C. Calculating Energy a.Kinetic Energy = Mass X Velocity 2 2 K.E. = mv 2 2 b. Units – mass= kilograms (kg) velocity = meters per second (m/s) K.E. = Joules

7
c. Practice Problems i. An 80 kg man is jogging at a velocity of 4 m/s. What is his kinetic energy? K.E. = mv 2 2 K.E. = 80 kg X (4 m/s) 2 2 K.E. = 80 kg X 16 m/s 2 K.E. = 640 J

8
ii. A 40 kg boy is jogging at a velocity of 4 m/s. What is his kinetic energy? K.E. = mv 2 2 K.E. = 40 kg X (4 m/s) 2 2 K.E. = 40 kg X 16 m/s 2 K.E. = 320 J

9
iii. A 40 kg boy is jogging at a velocity of 2 m/s. What is his kinetic energy? K.E. = mv 2 2 K.E. = 40 kg X (2 m/s) 2 2 K.E. = 40 kg X 4 m/s 2 K.E. = 80 J

10
Potential Energy

11
d. Calculating Potential Energy Gravitational Potential energy = weight x height P.E. = w x h

12
e. Potential Energy Units Weight = Newton’s (N) Height = meters (m) P.E. = Joules (J)

13
f. Practice Problems i. A 22 Newton book is placed on a shelf that is 0.86 meters high. P.E. = w x h P.E. = 22 N x 0.86 m P.E. = 18.92 J

14
ii. A 22 Newton book is placed on a shelf that is 1.86 meters high. P.E. = w x h P.E. = 22 N x 1.86 m P.E. = 40.92 J

17
How much Potential Energy does the racquet ball have at 100 cm and 50 cm? The racquet ball weighs 4.2 N. What is the relationship between bounce height and potential energy?

Similar presentations

OK

Potential and Kinetic Energy Understanding the cyclic nature of potential and kinetic energy.

Potential and Kinetic Energy Understanding the cyclic nature of potential and kinetic energy.

© 2017 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on trial and error factoring Nokia acquired by microsoft ppt online Ppt on general motors india Ppt on classification of salts Ppt on special types of chromosomes in human Ppt on blood stain pattern analysis definition Download ppt on civil disobedience movement in united Ppt on data handling for class 8 cbse Ppt on life cycle of a butterfly Ppt on electric meter testing software