Force
A FORCE is...
...a push or a pull of any kind.
MOTION is...
...a change of position of an object.
You kick a ball <--
LEFT!
Which is the energy of motion, Potential Energy or Kinetic Energy?
KINETIC ENERGY!
Throwing a ball is a push or a pull?
PUSH!
You gently push a book across the floor. Why might it stop before getting to the other side of the room?
FRICTION!
One small kindergartner holds a rope on the left. On the right, five big grade-four students pull. What happens?
RIGHT?
When a rubber band is stretched wide it has Potential Energy. When it is released what happens to its position?
Its position changes,
it's in motion,
and that's Kinetic Energy!
Opening a door is a push or a pull?
PULL!
Newton's 1st Law of Motion states that an object in motion will move in that direction with no change unless a force acts on it. What stops a grocery cart from rolling, eventually?
FRICTION!
A 50lb bag of dog food is moving left at 2 miles per hour. A 50lb bag of cat food is moving right at 2 miles per hour. They collide and then which way do they move?
They do not move, NO CHANGE!
A rollercoaster car is at the top of a rise about to go down. Does it have more potential or kinetic energy?
POTENTIAL!
Gravity is...
...a force that acts between two objects and pulls them together.
Newton's second law says that the amount of mass and the amount of force have an effect on motion. If you use more force to push an object will it go faster or slower?
FASTER!
Up, at rest, or down?
You jump up, why do you come back down?
GRAVITY!
How does an object gain Potential Energy?
The object's position or condition means that it could soon be in motion.
...the force of Gravity.
Newton's 3rd law says that for every action (force) there is an _____ and ______ opposite re-action.
EQUAL and OPPOSITE
Up, at rest, or down?
You are in a space suit in space. You straighten your legs as if jumping. What happens?
There is no gravity in space, you mostly stay still, at rest.
You throw a ball straight up as hard as you can. The ball goes up and up until it slows and then pauses for a moment. When it pauses does it have more Potential Energy or Kinetic Energy?
More POTENTIAL ENERGY!