Vocabulary
The tendency of an object to resist a change in motion.
What is intertia?
Mrs. Kunkel rolled a marble across the floor to Mrs. Plummer What force started the ball rolling? (balanced force, unbalanced force, gravity, friction)
What is an unbalanced force?
An area of darkness where light is blocked by an object.
What is a shadow?
This is the force that acts on a space shuttle as it accelerates toward Earth.
What is gravity?
A block is being pushed with a force of 20N to the right. The friction against the box has a force of 5N. What is the acceleration of the box? (Include direction)
15N to the right
What is contact force?
Which will experience more acceleration when the same force is applied, a 10kg object or a 5kg object?
What is the 5kg object?
Friction is a force caused by___________.
What is surfaces rubbing against one another?
The first part of Newton's First Law of Motion states: An object ___ ______ tends to _____ ____ ____ unless acted upon by an ________ _______.
What is at rest, remain at rest, and unbalanced force?
Where should the sun be in the sky to create the smallest shadow of a tree?
What is straight up or noon?
The rate at which the speed or direction of an object changes over time.
What is acceleration?
What is needed to give a boulder acceleration?
A large force that changes the boulders speed/direction.
Jackson was investigating the use of magnets to move objects. He observed that some objects moved toward the magnets without having to touch them. Jackson's observation can be described by saying that the magnets have what type of force?
What is non-contact force?
The second half of Newton's First Law of Motion states: An object in _______ in a straight line tends to ______ _____ _______ in a straight line unless acted upon by _____________ __________.
What is motion, stay in motion, another force (or outside force)?
When you shine a light on your hand to create a shadow, it blocks it. Your hand does one of two things to the light?
What is absorbs or reflects?
Mrs. Kunkel's 5th grade class and Mrs. Plummer's 6th grade class challenged each other to a game of tug-of-war. Each class grabbed onto different ends of the long rope (Mrs. Kunkel to the left and Mrs. Plummer to the right). Mrs. Plummer blew a whistle and both teams began to pull and pull. Mrs. Plummer's class pulls with a force of 215N and Mrs. Kunkel pulls with a force of 180N. What is the unbalanced force?
35N to the right
Mrs. Kunkel's 5th grade class and Mrs. Plummer's 6th grade class challenged each other to a game of tug-of-war. Each class grabbed onto different ends of the long rope. Mrs. Plummer blew a whistle and both teams began to pull and pull. Neither team could pull the other team over. Give a statement about the forces involved in the tug-of-war between the two 5th grade classrooms. "The forces were ___________ because _______________."
What is (something like) "the forces were balanced because the teams could not pull each other over"?
You can describe an object sitting at rest on the ground as follows: The ______ of the object on the ground is _________ with the ________ of the ground on the object.
What is force, balanced, and force?
A light source that is closer to the object creates a shadow that...
What is the objects shadow will be bigger and more distorted (blurry)?