What is a PUSH or PULL on an object?
Force
CONTACT or NON-CONTACT FORCE?
A boy using his foot to kick a soccer ball.
A. Contact
B. Non-Contact
B. CONTACT FORCE
The force that acts directly against the direction of motion.
What is friction?
A golf ball rolls down a hill on the golf course. Which statement best describes how friction affects the motion of the golf ball?
A. Friction causes the ball to bounce.
B. Friction decreases how far the ball rolls.
C. Friction increases how fast the ball rolls.
B. Friction decreases how far the ball rolls.
On Earth, the pull of gravity on the mass of an object is a measurement of this
What is weight?
If these boys are each pulling with the force of 10 newtons. What will happen?
The boy in blue will win.
They will not move at all.
The boy in red will win.
They will not move at all. Balanced force is being applied.
Equal to
True or False: Gravity is a force that pulls objects toward the core of the Earth.
True
When the speed of an object stays the same.
What is constant speed?
An objects location is its ________.
What is position?
Which of the following statements is true?
Balanced forces cause a change in position.
Unbalanced forces cause a change in position.
Forces do not affect position.
Unbalanced forces cause a change in position.
CONTACT FORCE or NON-CONTACT FORCE:
Using your fingers to play the piano.
A. Contact Force
B. Non-Contact Force
A. Contact Force
A soccer ball is at rest on the ground. When a force is applied to it, it moves. If larger force is applied to it, how will the motion of the soccer ball change?
A. The ball will move slower.
B. The ball will move farther and faster.
C. The ball will come to a stop.
B. The ball will move farther and faster.
A sudden increase in speed is called:
Acceleration
What is Force
A push or a pull (something that changes the position or shape of an object)
FREE SPACE
FREE SPACE
CONTACT OR NON-CONTACT FORCE?
The magnetic needle of a compass always points north.
A. Contact Force
B. Non-Contact Force
B. Non-Contact
What is more reliable in physics: weight or mass?
Mass
poles
In outer space, the measurement of an object's weight changes, but its _______ stays the same.
What is mass?
Force can...
1. Keep an object at rest (not move).
2. Make an object move.
3. Change the object's direction.
4. Slow down or stop the moving object.
5. All of the above
5. All of the above
If Superman throws a house, a skyscraper, and a volleyball, name these in order of lowest amount of mass of these objects to the highest.
Volleyball, house, skyscraper
Air Resistance acts in the opposite direction of the force of ____________________________
Gravity
1. What happens when the same poles of 2 different magnets are facing each other?
2. What happens when opposite poles of 2 different magnets are facing each other?
1. Same poles REPEL.
2. Opposite poles ATTRACT.
Force is measured in what units?
N (Newtons)
What non-contact force pulls a ball back to earth?
Gravity
Name the Contact Force & Non-Contact Force in the scenario.
A boy bats a baseball into the air. The ball falls to the ground.
Contact Force: boy hits the ball with a bat
Non-contact force: ball falls to the ground (gravity)
What would cause the most friction:
1. ice
2. sandpaper
3. an oil slick
1. sandpaper
Name a magnetic metal
What is Iron (or Steel, or Cobalt, or Nickel)
What ALWAYS changes when an object is in motion?
a. its phone number
b. its speed
c. its mass
d. its position
d. its position