Vocabulary
The total amount of matter, or "stuff," in an object.
Mass
a force exerted on an object by another object or person
Applied Force
Maddy is pushing a box with 25N of force to the left and Gabby is pulling the box with 10N of force to the left.
What is the net force and what direction will the box move?
Net Force: 35N
Left
Alberto has not touched the pencil yet, so it is at rest. He finally decides to pick it up and start his work.
What law is this demonstrating?
Newton's 1st Law
What is Ms. Egan's favorite chocolate candy bar?
Milky way
Opposite and equal forces acting on an object. Object doesn’t move. Net force = 0 N
Balanced Forces
When a ball is rolling on the ground and looses speed, this is due to what force?
Friction Force
Jack Johnathan Jones can lift the barbell with 200N of force. Gravity is pulling the barbell down with 50N of force.
What is the net force and which direction will the barbell move?
150N Up
Eloise rolls a 5kg bowling ball with 10N of force, and Melanie rolls a 5kg bowling ball with 5N of force.
Whos bowling ball with accelerate faster and what law does this demosntrate?
Eloise ball will accelerate (2m/s2)
2nd Law
Where in the US is Ms. Egan going this summer?
New Jersey
a change in motion: either a change in speed or direction (or both)
Acceleration
When a book is sitting on a table it is exerting what force on the table?
Normal Force
Jefferson, Owen, and Jeremy are playing tug of war.
Jefferson is pulling with 20N to the left, Jeremy is pulling with 50N to the right and Owen is pulling with 10N to the left.
What is then net force and who will win?
Net force: 20N
Jeremy wins! (Right)
Cristian kicks a soccer ball at Ernesto with 10N of force.
Ernesto will hit the ball back with how much force?
What law does this demonstrate?
10N
3rd Law (Force pairs)
Does Ms. Egan prefer the mountains or the beach?
Mountains!
Actual force on an object with direction
Net Force
As a ball flies through the air and gradually slows and gets closer to the ground, what two main forces are acting on it?
Air resistance and Gravitational Force
Jacob is playing trash-sketball. He throws the ball with 5N of force at the basket. The air resistance pushes the ball with 2N of force in the opposite direction.
Will Jacob make the basket and what is the net force of the ball?
3N to the basket, Jacob makes it!
Yeinel throws a pencil across the room at Angie. When the pencil hits Angie it stops and hits the ground.
What law is this demonstrating?
Newtons 1st law (objects in motion stay in motion until acted upon by an unbalanced force)
What sport has Ms. Egan coached before?
Basketball
the ability of an object to resist anchange in motion
Inertia
When you push a box across the floor what two main forces are acting on the box?
Applied force by you and friction force by the ground
Galina is pushing her desk across the room with 100N of force. Aaliyah tries to push the desk in the opposite direction with 100N of force.
Who moves the desk and what is the net force?
No one moves the desk
Net force: 0
Ms. Egan needs help rearranging the room. Manny pushes his 10kg two person desk with 20N of force. Junior moves his 5kg one person desk with 20N of force.
Who's desk will move at a higher acceleration
What law does this demonstrate?
Junior's desk will move at 4m/s2
Manny's desk will move at 2m/s2
2nd Law
What is Ms. Egan's favorite month?
October! Spooky Halloween and fall weather :)