Vocabulary Lesson 1
Any push or pull that acts on an object
What is force?
A law that states when one object exerts a force on another object, the second object exerts an equal force in the opposite direction.
What is Newton's 3rd Law?
An area of partial darkness where light waves have been blocked.
What is shadow?
Besides strength or magnitude, what does force have?
What is direction?
Finish this sentence-the greater the net force acting on an object...
What is the greater the acceleration on the object.
A force that results when two materials rub against each other
What is friction?
A law that states an object in motion will stay in motion unless a net force acts on it
What is Newton's 1st law?
A form of energy that travels in waves and in a straight path.
What is light energy?
This force slows a soccer ball down when it is in motion on a field.
What is the grass?
This happens when forces acting on an abject are equal in strength and opposite in direction.
What is the motion of the object does not change.
Any force that acts at a distance
What is non-contact force
The rate at which the speed or direction of an object changes.
What is acceleration?
Two or more forces in equal strength but opposite directions that cancel each other out.
What is balanced forces?
These forces act on different objects with either a push or pull.
What is electric or magnetic forces?
Shadows are long in the morning.
What is the sun is low in the sky?
The force of attraction between any two objects
What is gravity?
The tendency of an object to resist any change in motion.
What is inertia?
What 3 factors determine the size of a shadow?
What is size of the object, angle of the light source and closeness of the light source to the object?
An object speeds up or slows down when this happens?
The formula for force is.
What is force=mass x acceleration?
Any force that requires 2 or more objects to touch
What is contact force?
This is when an object moves in a straight line without changing speed or direction.
What is uniform motion?
The total al ALL forces acting on an object.
What is net force?
On a roller coaster, this makes you rise out of your seat at the top of a hill.
What is inertia?
One boy is pulling a cart to the left with 50 N and another boy is pushing the same cart in the same direction with HALF as much force. The magnitude of the combined forces is ____________? What direction is the cart moving _______?
50 + 25 = 75N
Left