Download presentation

Published byKyla Brint Modified over 2 years ago

1
Chapter 3 – Forces Section 1 – Newton’s Second Law

2
Chapter 3 – Forces Section 1 – Newton’s Second Law Force and motion are connected

3
Chapter 3 – Forces Section 1 – Newton’s Second Law Force and motion are connected An object will have greater acceleration if a greater force is applied to it

4
Little Acceleration Little Force Same Mass Big Force Big Acceleration

5
Chapter 3 – Forces Section 1 – Newton’s Second Law Force and motion are connected An object will have greater acceleration if a greater force is applied to it The mass of an object and the force applied to it affect acceleration

6
**Small Mass / Big Acceleration**

Same Force Big Mass / Small Acceleration

7
Newton’s second law of motion connects force, mass, and acceleration in the equation acceleration equals net force divided by mass

8
F m Or F= ma a =

9
Newton’s second law of motion connects force, mass, and acceleration in the equation acceleration equals net force divided by mass Friction – force that opposes motion between two surfaces that are touching each other

10
Newton’s second law of motion connects force, mass, and acceleration in the equation acceleration equals net force divided by mass Friction – force that opposes motion between two surfaces that are touching each other Microwelds, areas where surface bumpers stick together, are source of friction

12
**Friction between two surfaces that are not moving past each other is called static friction**

13
**Friction between two surfaces that are not moving past each other is called static friction**

Sliding friction – force that opposes motion of two surfaces sliding past each other

14
**Friction between two surfaces that are not moving past each other is called static friction**

Sliding friction – force that opposes motion of two surfaces sliding past each other Friction between a rolling object and the surface it rolls on is called rolling friction

15
**Air resistance that opposes the force of gravity**

16
No Air Resistance Air Resistance

17
**Air resistance that opposes the force of gravity**

The amount of air resistance depends on an object’s shape, size, and speed

18
**Air resistance that opposes the force of gravity**

The amount of air resistance depends on an object’s shape, size, and speed Terminal velocity – forces on a falling object are balanced and the object falls with constant speed

19
Section 2 – Gravity

20
Section 2 – Gravity Law of gravitation – any two masses exert an attractive force on each other

22
Section 2 – Gravity Law of gravitation – any two masses exert an attractive force on each other Gravity is one of the four basic forces that also include the electromagnetic force, the strong nuclear force, and the weak nuclear force

23
Section 2 – Gravity Law of gravitation – any two masses exert an attractive force on each other Gravity is one of the four basic forces that also include the electromagnetic force, the strong nuclear force, and the weak nuclear force Gravity is a long-range force that gives the universe its structure

24
**Due to inertia, all objects fall with the same acceleration regardless of mass**

26
**Due to inertia, all objects fall with the same acceleration regardless of mass**

Weight – gravitational force exerted on an object

28
**Due to inertia, all objects fall with the same acceleration regardless of mass**

Weight – gravitational force exerted on an object Weight decreases as an object moves away from Earth

29
**Due to inertia, all objects fall with the same acceleration regardless of mass**

Weight – gravitational force exerted on an object Weight decreases as an object moves away from Earth Weight results from a force; mass is a measure of how much matter an object contains

30
**Objects in the space shuttle float because they have no force supporting them**

32
**Objects in the space shuttle float because they have no force supporting them**

Projectiles have horizontal and vertical velocities due to gravity, and follow a curved path

34
**Objects in the space shuttle float because they have no force supporting them**

Projectiles have horizontal and vertical velocities due to gravity, and follow a curved path Acceleration towards the center of a curved path is called centripetal acceleration; it is caused by centripetal force, an unbalanced force

36
**Section 3 – The Third Law of Motion**

37
**Section 3 – The Third Law of Motion**

Newton’s third law of motion – to every action there is an equal and opposite reaction force

38
**Section 3 – The Third Law of Motion**

Newton’s third law of motion – to every action there is an equal and opposite reaction force Action – reaction forces act on different objects and differ from balanced forces

40
**Section 3 – The Third Law of Motion**

Newton’s third law of motion – to every action there is an equal and opposite reaction force Action – reaction forces act on different objects and differ from balanced forces Rocket propulsion is based on Newton’s third law of motion

42
Before it was discovered, the existence of the planet Neptune was predicted based on gravitational forces and Newton’s laws

44
Before it was discovered, the existence of the planet Neptune was predicted based on gravitational forces and Newton’s laws Momentum – related to how much force is needed to change an object’s motion; momentum equals mass times velocity

46
Before it was discovered, the existence of the planet Neptune was predicted based on gravitational forces and Newton’s laws Momentum – related to how much force is needed to change an object’s motion; momentum equals mass times velocity Law of conservation of momentum – momentum can be transferred between objects; momentum is not lost or gained in the transfer

Similar presentations

OK

Chapter 4 1 ZAP !. 2 12345678 910111213141516 1718192021222324 2526272829303132 3334353637383940 4142434445464748 4950515253545556 5758596061626364.

Chapter 4 1 ZAP !. 2 12345678 910111213141516 1718192021222324 2526272829303132 3334353637383940 4142434445464748 4950515253545556 5758596061626364.

© 2017 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on quality assurance in engineering education Ppt on singapore stock exchange Ppt on speed control of dc shunt motor Ppt on tata trucks new Ppt on asymptotic notation of algorithms to solve Ppt on corporate personality development Ppt online compressor sales Ppt on viruses and anti viruses test Ppt on world technology day Open ppt on ipad