Vocabulary
It is a force that we experience every day. Even when we sleep! This force pulls us toward the Earh's surface keeping us on the ground.
Gravity!
What is the unit for force? The unit is also named after an awesome scientist with sweet hair who first explained gravity! ;)
Newtons!
Forces can be shown as an arrow. What TWO things does an arrow show us about a force?
Amount of force AND direction!
Girls are playing against the boys in tug-a-war. Girls are pulling with 1000N of force, while the boys are pulling with 600N of force. What kind of force is this? Bal. or Unbal.?
Unbalanced.
100N to the right, 50N to the left.
Bal/Unbal?
Net Force?
Motion occur?
What direction?
Unbalanced/50N/yes/ right
This word means, "the amount of matter in an object". In Spanish, it is pronounced "masa".
Mass!
Fill in the blank: If a force is applied in the same direction, the speed will ______. If a force is applied on the opposite direction, the speed will ______.
Increase/decrease.
What object would move most if all were pushed with the same amount of force? Explain.
A) a bowling ball
B) a marble
C) a 3lbs stone
A marble because it has less mass!
Forces have a net force of zero. Is the object moving? Yes or No? Balanced or Unbalanced?
No and Unbalanced.
100N up, 100N up, 200N down
Bal/Unbal?
Net Force?
Motion occur?
What direction?
Balanced/ 0N/ No/ No motion
Define "Friction".
A force of resistance, slowing objects down. It occurs when two objects come in contact with each other.
A force is a ____ or a ____.
Which of the following surfaces has the least amount of friction? Explain.
A) a gravel driveway
B) a dirt road
C) a road covered with ice
C) A road covered with ice.
Why doesn't a book move on your desk?
300N right, 200 left
Bal/Unbal?
Net Force?
Motion occur?
What direction?
Unbalanced/ 100N/ Yes/ Right
What is the difference between Balanced and Unbalanced forces?
Balanced forces do not move and are equal. Unbalanced forces cause motion.
When you are riding a bike and you decide to stop by squeezing the brakes. What force helps you slow down?
Friction.
Omar threw a paper airplane in class... (#EyeRoll) How will gravity make the airplane move? Explain.
A) a straight line
B) up toward the sky
C) down to the ground
When you're standing on the ground, gravity is pulling you down. What type of force is pushing back up against your feet?
Applied force/ Contact force/ Normal force
400N right, 300 down, 300 up, 1100 left
Bal/Unbal?
Net Force?
Motion occur?
What direction?
Unbalanced/ 700N/ Yes/ Left
What does the term "Net Force" mean?
The total amount of force acting on an object.
Describe two forces in a scenario. The two forces must act against each other.
Answers will vary.
Ex: The ball is kicked and is rolling down the field. Friction is acting on the ball and slowing it down.
Explain two forces involved in the "balloon rocket" demonstration.
Answers will vary.
Ex: Blowing up the balloon and the air pressure pushing back into it. Flying/air resistance.
When a force is applied to an object, what are the 3 possible changes of motion.
Speeding up/ slowing down/ changing directions
100N down, 100N down, 200N up, 400N left, 400 right
Bal/Unbal?
Net Force?
Motion occur?
What direction?
Balanced/ 0N/ No/ No motion