Contact and Non-Contact Forces
A force that acts at a distance.
What are non-contact forces
Who discovered the laws of motion?
Who is Isaac Newton
A push or a pull that acts on objects
Force
The rate at which the speed or direction of motion of an objects changes over time
Acceleration
Give an example of a non-contact force
Electricity, gravity, or magnetism
Name the law of motion: An object that in motion will remain in motion unless a force acts on the object
What is the 1st law of motion
How do electric and magnetic forces act on different objects?
They will either push or pull objects
A ball is rolled across four different surfaces with the same force. Which surface will slow the movement of the ball the most?
A grassy field
A force that requires two pieces of matter to touch
What are contact forces
Name the law of motion: Force is the product of mass and acceleration
What is the 2nd law of motion
When you ride a roller coaster, __________ makes your body rise out of its seat at the top of the hill.
Inertia
What happens when an object accelerates?
Its speed or direction will change
Give an example of a contact force.
Friction or air resistance
Name the law of motion: For every action, there is an equal and opposite reaction.
What is the 3rd law of motion
Finish this sentence: The greater the net force acting on an object....
The greater its acceleration
Uniform motion is...
Motion where the speed and direction does not change
Name a contact AND a non-contact force that affects the motion of a baseball after a pitcher has thrown the ball
Multiple answers allowed. Should mention friction, air resistance, gravity, electrical, or magnetic forces
The mass of a toy car is 8 kg and it travels 6 meters per second. What is the force acting on the car?
48 N
Besides a strength or magnitude, what does every force have?
Direction
You are building a wooden car to enter a downhill race. What can you do to make the car go as fast as possible?
Multiple answers allowed. Making the car heavier or changing its shape.