Forces and Motion 1
What is the most important factor in determining whether an object is moving?
Speed, Color, Reference Point, Time
Reference Point
_______ is described as a push or pull
Force
What type of force is present when two surfaces touch each other?
Contact Force
Gravity
What type of force is Gravity?
Non-Contact
What should you do when two forces act in the same direction on an object?
Add the forces together
What should you do when two forces act in opposite directions on an object?
Subtract the forces
What happens to the net force if two equal forces act in opposite directions?
The net force is zero/balanced
How do scientists typically represent the strength of a force using arrows?
The arrows length
In a moving vehicle, why might a passenger appear stationary
The passenger is moving relative to the vehicle. The car is the reference point
What makes the ground an ideal reference point for measuring motion?
The ground is stationary
What unit do we use to measure force?
Newton
Change in the position of an object relative to a reference point is...
Motion
F=MxA is which of Newton's Laws?
Newton's Second Law
Newton's Third Law states, "For every action, there is an equal but __________ reaction."
Opposite
A ball hits the ground with a downward force, and the ground pushes the ball upward with equal force. This explains which of Newton's Laws?
Newton's Third Law
Newton's First Law is also known as the .....
Law of Inertia
A person pushes down on a trampoline, which in turn exerts an equal upward force to lift them. This explains which of Newtons Laws?
Newton's Third Law
An object in motion will stay in motion until an unbalanced force acts upon it. Which of Newton's Laws?
Newton's First Law
An object at rest will stay at rest until an unbalanced force acts upon it. Which of Newton's Laws?
Newton's First Law of Motion
Why do scientists use a reference point when studying motion?
To determine whether an object is moving or stationary
What distinguishes a non-contact force from a contact force?
Non-Contact forces act through space without direct contact. // Contact Forces require direct contact
When determining net force, you need to know both the _____________ and ___________
Direction and Force
Why is friction important?
Helps us write, walk, and prevents sliding