What is a Force?
What is motion?
Motion is when something is changing its position or moving from one place to another.
What is the definition of a contact force?
Contact forces can make an object move, stop, change direction or change shape.
True or False: Gravity is what keeps the planets orbiting around the Sun.
True.
What is a magnet?
Magnets can push or pull on certain metals, like iron. Magnets have a north and a south pole where opposites attract.
A force that pulls objects toward the center of the Earth is called ________________.
Gravity
What is force?
Force is a push or a pull that can make an object move, stop, or change direction.
What is the definition of a non-contact force?
Non-contact forces are forces that can push or pull objects even when they aren't touching.
What slows down objects when they fall?
Air resistance.
What are magnetic poles?
Magnets always have two poles: a north pole and a south pole. They are on each end of the magnet.
These poles are where the magnet's pull or push is strongest.
Non-contact forces can act on objects without ________________ them.
Touching
Would riding a skateboard be an example of a push or pull contact force?
Push because you are pushing off of the ground with your foot to move the skateboard forward.
What are the 2 kinds of non-contact forces?
Magnetism and gravity.
How does mass affect gravity?
Objects with more mass have stronger gravity.
Define the words "attract" and "repel"
Attract is when two things pull together and stick, like when you give someone a hug!
Repel is when two things push away from each other, like when you tell someone "No thank you.”
When two magnets have the same poles facing each other, they will ________________ away from each other.
What did Sir Isaac Newton Discover?
One of the big things he discovered is called the Laws of Motion. These laws are like rules that explain how objects move! (Gravity)
What is gravity?
Gravity is the force that pulls things towards each other. It's what keeps us on the ground, makes things fall down and keeps the planets orbiting around the sun.
In a vacuum, do heavier or lighter objects fall faster?
Trick question! They fall at the same speed because there is no air resistance.
Name 3 magnetic materials.
Iron, cobalt, and nickel.
The area around a magnet where its force acts is called a ________________ field.
Magnetic
What is Newton's First Law?
An object at rest will stay at rest, and an object in motion will stay in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
What is magnetism?
Magnetism is a force that can pull or push certain metals. Magnets have north and south poles, and opposites attract. Earth also has a magnetic field.
What 2 objects were dropped in the vacuum in the video that we watched during lesson 3?
A feather and a bowling ball.
What is a magnetic field?
The area around a magnet where its force can be felt. It’s like an invisible bubble around the magnet.
A magnet can attract objects made of ________________, nickel, or cobalt.
Iron