Ping-Pong
A push or a pull that can cause the motion of an object to change. It has two important properties: strength and direction.
Force
How fast an object is moving
speed
Has a push or a pull. Has has both strength and direction. Causes objects to change their motion.
When one force is stronger than the other the result is motion.
Unbalanced force
When two forces act on an object with equal strength.
zero net force
When two equal forces act in opposite directions the result is that the forces are balanced and there is no motion.
Balanced force
If you drop a ball is it at rest or in motion?
The ball is in motion. The forces acting on the ball are unbalanced (Gravity is pulling it down)
A student sitting in a chair an example of balanced or unbalanced forces?
Balanced forces - gravity is pulling the student down and the chair is pushing the student up with equal force, resulting in no motion.
The rubbing of two surfaces when they contact each other.
Friction
The process of moving or changing position.
Motion
Change in position, speed, or distance.
Motion
A force that attracts objects toward the earth. "What goes up, must come down!"
Gravity
The amount of force that is applied to an object.
Strength
What has to happen in a game of tug of war for the forces to be balanced?
Both sides need to be pulling with the same amount of force in opposite directions for the forces to be balanced.
The path an object moves in
Direction of motion
This force is always pulling objects toward the Earth
gravity
The amount of matter contained in an object. “how much stuff is there.”
Mass