Example Problem A man at the top of a building drops a ball. It takes 3 seconds for the ball to fall to the ground, how tall is the building?

Example Problem A man is running with a constant velocity of 9 m/s and covers a distance of 27 m? How long was he running for?

Example Problem A man throws a ball horizontally from the top of a building with a velocity of 9 m/s. If the ball lands 27 m from the edge of the building, how tall is the building? 9 m/s

Physics Honors A/B–Day 11/1/15 Newton’s Laws

Isaac Newton Conceived Calculus Described Planetary Motion Designed and Constructed Reflecting Telescope

Newton’s Laws of Motion Seen as Father of Physics Newton’s Laws are laid down in Newton’s Principia Gravity is Universal

Newton’s First Law of Motion An object in motion continues in motion with the same velocity unless acted upon by an unbalanced force; an object at rest will tend to stay at rest The Law of Inertia

Newton’s First Law of Motion Inertia – the tendency of an object to maintain it’s state of motion Inertia developed by Galileo Mass is a quantity that is determined by the inertia of the object Inertial Mass

What is a Force?

How do you represent Force?

Force Diagrams Force Can be in equilibrium (balanced) or could be causing acceleration (unbalanced)

Forces addition or subtraction Parallel Forces add or subtract Perpendicular Forces do not affect each other

Newton’s First Law of Motion Example of 1 st law would be if you ever sat in a truck and it stopped.

Newton’s Second Law of Motion

Balanced Forces cause equilibrium Moving or staying constant velocity Unbalanced Forces – cause object to accelerate

Newton’s 2nd Law of Motion

Newton’s Third Law of Motion If two objects interact, the magnitude of the force exerted on object 1 by object 2 is equal to the magnitude of the force simultaneously exerted on object 2 by object 1 and these two forces are in opposite direction Every action has an equal and opposite reaction

How do you represent multiple forces on an object? Graphically Forces can be shown on a free body diagram

Practice Problem Draw a free body diagram for a book on a table not moving.

Practice Problem Draw a free body diagram for a book on a table moving at a constant velocity.

Practice Problem Draw a free body diagram for a book on a table moving with a changing velocity (accelerating).

Practice Problem Draw a free body diagram for a book on an inclined plane not moving.

Practice Problem

Homework – Due 11/06/15 Watch Videos on youtube Channel “Flipping Physics” Forces and Newton’s Laws of Motion