Download presentation

Presentation is loading. Please wait.

1
Types of Energy Principles of Physics

2
**Energy Objects have energy if they are able to do things**

A way of explaining why things happen Energy is a scalar quantity (no direction)

4
**Kinetic energy Energy of Motion**

KE = ½ mv2 KE = Kinetic energy (Joules = J) m = mass (kg) v = velocity (m/s)

5
Example A 5 kg block is sliding on a frictionless horizontal surface with a speed of 5 m/s. Calculate the kinetic energy of the block KE = ½ mv2 = ½ (5)(5)2 KE = 62.5 J

6
**Potential energy Energy of position or condition**

Gravitational PE = mgh PE = potential energy (J) m = mass (kg) g = gravitational acceleration = 9.8 m/s2 h = height (m) Other types of PE: spring, electrostatic

7
Example A 0.100kg egg is dropped from the top of the bleachers which are 5.5 m high. Calculate the potential energy of the egg. PE = mgh PE = (0.100)(9.8)(5.5) PE = 5.39 J

8
**Mechanical energy Total mechanical energy of a system:**

All the potential energy and all of the kinetic energy that the system contains

9
Example A toy airplane with a mass of 30 kg is travelling 35 m above the ground at 40 m/s. How much mechanical energy does the airplane have? KE = ½ mv2 PE = mgh KE = ½ (30)(40)2 PE = (30)(9.8)(35) KE = 24,000 J PE = 10,290 J Total Mechanical Energy = 24, ,290 = 34,290 J

Similar presentations

© 2022 SlidePlayer.com Inc.

All rights reserved.

To make this website work, we log user data and share it with processors. To use this website, you must agree to our Privacy Policy, including cookie policy.

Ads by Google