Download presentation

2
**Wednesday, Jan. 27th Agenda**

Homework Questions/problems/collect Begin section 7.3: Newton’s Laws of Motion Newton’s 1st law, inertia, Newton’s 2nd law In-Class assignment: Pg. 236, practice #1-3 Movie: “Laws of Motion” Homework: “The Great Plague and Isaac Newton” worksheet

3
Homework Section 7.2 review Pg 233: #1-7 Problems/Questions? Turn In

4
**Section 7.3: Newton’s Laws of Motion**

Every motion you see or experience is related to a force. Sir Isaac Newton described the relationship between motion and force in 3 laws that we now call Newton’s Laws of Motion

5
Newton’s 1st Law Newton’s First Law: An object at rest remains at rest and an object in motion maintains its velocity unless it experiences an unbalanced force.

6
Newton’s 1st Law You experience Newton’s 1st law when you ride in a car. As the car comes to a stop, you can feel your body continue to move forward. Your seat belt and the friction between your pants and the seat stop your forward motion. They provide the unbalanced rearward forces needed to bring you to a stop as the car stops.

7
Inertia Inertia: the tendency of an object to remain at rest or in motion with a constant velocity All objects have inertia because they resist changes in motion.

8
Newton’s 2nd Law Newton’s Second Law: The unbalanced force acting on an object equals the object’s mass times its acceleration. Force = (mass) X (acceleration) F = ma

9
**Newton’s 2nd Law a = F m m = F a**

Just like we did before, we can rearrange the equation F = ma to solve for different things. To solve for acceleration: a = F m To solve for mass: m = F a

10
**Force = mass X acceleration**

Newton’s 2nd Law Force = mass X acceleration

11
**Force is Measured in Newtons**

Newton (N): the SI unit of force 1 Newton is the force that can give a mass of 1 kg an acceleration of 1 m/s2. 1 N = 1 kg X 1 m/s2 1 N = pounds 1 pound = N

12
**Newton’s 2nd law example, pg 236**

Zookeepers lift a stretcher that holds a sedated lion. The total mass of the lion and stretcher is 175 kg, and the lion’s upward acceleration is m/s2. What is the unbalanced force necessary to produce this acceleration of the lion and the stretcher? Equation: Force = mass X acceleration Mass = 175 kg Acceleration = m/s2 Solve: Force = 175 kg X m/s2 = 115 kg∙m/s2 = 115 N

13
**Newton’s 2nd law example #2**

Assume that a catcher in a professional baseball game exerts a force of 65.0 N to stop a ball. If the baseball has a mass of kg, what is its acceleration as it is being caught? Equation: a = F m Force = 65.0 N Mass = kg Solve: a = 65.0 N = 448 m/s2 0.145 kg

14
**Newton’s 2nd law example #3**

A whale shark is being lifted by a crane for transport to an aquarium. The crane uses a force of 25,000 N to lift the shark. If the shark’s acceleration is 1.25 m/s2, what is the shark’s mass? Equation: m = F a Force = 25,000 N Acceleration: m/s2 Solve: m = 25,000 N = 20,000 kg 1.25 m/s2

15
In-Class Assignment Practice problems, pg. 236, #1-3

16
Movie “Laws of Motion”

17
Homework Worksheet: “The Great Plague and Isaac Newton”

Similar presentations

Presentation is loading. Please wait....

OK

Chapter Six: Laws of Motion

Chapter Six: Laws of Motion

© 2018 SlidePlayer.com Inc.

All rights reserved.

To ensure the functioning of the site, we use **cookies**. We share information about your activities on the site with our partners and Google partners: social networks and companies engaged in advertising and web analytics. For more information, see the Privacy Policy and Google Privacy & Terms.
Your consent to our cookies if you continue to use this website.

Ads by Google

Ppt on hindu religion gods Ppt on trade fair in china Ppt on etiquette and manners in office Ppt on 555 timer application Free ppt on cost accounting Ppt on brand equity Ppt on power diode ppt Convert pdf to editable ppt online Download ppt on working of human eye Ppt on magnetic field lines class 10