Vocabulary
The tendency of an object to resist a change in motion.
What is intertia?
Ms. Moore rolled a marble across the floor to Mr. Young What force started the ball rolling and what force stops the ball from rolling? (balanced force, unbalanced force, gravity, friction)
An unbalanced force and then friction.
Does friction work in the same direction or the opposite direction of an unbalanced force?
Friction works in the opposite direction of an unbalanced force.
Does increasing the force increase the kinetic energy?
Yabba-dabba-YES!
This is the force that acts against the Space X rocket as it accelerates from Earth on its way to Mars.
Gravity
How does a baseball batter demonstrate work?
The baseball batter demonstrates work by hitting the ball and changing its motion and position.
Picture a ramp that someone slides boxes down. Describe how the force of friction is affected by changing the angle of the ramp.
The greater the angle of the ramp, the less force from friction will affect the boxes.
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?
What would happen if a 25kg ball rolled down a ramp and hit a 25kg toy car that was at rest on a smooth floor?
The energy would be transferred from the ball to the car and the car would roll in the same direction until the force of friction caused it to stop.
What do you call a force causing a change in an object's motion?
An unbalanced force.
What is needed to give a boulder acceleration?
A force that is strong enough to overcome the boulder's inertia.
Explain how Nasya could conduct an experiment on the effects of friction affecting the speed of Hot Wheels cars.
Start the cars from the same height, at the same time, with the same amount of force, but use different surfaces on the track.
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)?
What is the difference between potential and kinetic energy?
Potential energy is stored energy and kinetic energy is energy in motion.
This exists when all the forces acting on an object result in the object staying at rest or moving at a constant speed in the same direction.
What is balanced force?
Mrs. Moran's 5th grade class and Mr. Simper's 5th grade class challenged each other to a game of tug-of-war. Each class grabbed onto different ends of the long rope (Mrs. Moran's to the left and Mr. Simper's to the right). Mrs. Smyers blew a whistle and both teams began to pull and pull. Mrs. Moran's class pulls with a force of 215N and Mr. Simper's pulls with a force of 180N. What is the unbalanced force?
35N to the right
Mrs. Moran's 5th grade class and Mr. Simper's 5th grade class challenged each other to a game of tug-of-war. Each class grabbed onto different ends of the long rope. 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 ______________."
(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?
If Sebastian pushes his Barbie corvette, it will roll and then come to a stop. In detail, explain what causes Sebastian's Barbie corvette to come to a stop.
The force of friction acting in the opposite direction causes the car to stop.