Acceleration Graphs
For the first 5 seconds, you accelerate by 10 mph/s.
For the next 5 seconds, you decelerate by 5 mph/s. In the next 5 seconds, remain at a constant speed. In the last 5 seconds, you accelerate by 10 mph/s.
Cortez will show you the graph.
What is the Acceleration Formula?
Acceleration = (Final Speed - Initial Speed) / Time
When are the Forces acting on an object unbalanced?
When the Net Force does not equal zero. When one force is greater than the others.
What is Newton's Third Law of Motion?
Every action has an equal and opposite reaction.
What type of friction is Air Resistance?
Fluid Friction
Cortez will put the graph on the board.
For the first 5 seconds, you accelerate by 5 mph/s.
For the next 5 seconds, you remain at a constant speed. In the next 5 seconds, you accelerate by 5 mph/s. In the last 5 seconds, you decelerate by 5 mph/s.
What is a reference point?
A place or object used for comparison to determine if an object is in motion.
What is the unit used to measure Force?
Newtons
What is Newton's First Law of Motion?
An object at rest will stay at rest, and an object moving at a constant velocity will continue moving at a constant velocity, unless it is acted upon by an unbalanced force.
What type of friction is opposing you when you move your dresser to a different side of your room?
Sliding Friction
For the first 5 seconds, you accelerate by 10 mph/s.
For the next 5 seconds, you remain at a constant speed. In the next 5 seconds, you accelerate by 5 mph/s. In the last 5 seconds, you decelerate by 15 mph/s.
Cortez will show you the graph.
How can I be both in motion and not in motion at the same time?
Depends on the reference point. Compared to the seat, you are not in motion. Compared to the sun, you are in motion.
What are the two forces acting on an object in free fall, and which one is greater.
Gravity and fluid friction (air resistance), though the gravity is much greater.
What is Newton's Second Law of Motion
Force = Mass x Acceleration
What type of Friction is used when a roller coaster is brought to a stop?
Cortez will put the graph on the board.
For the first 5 seconds, you accelerate by 15 mph/s.
For the next 5 seconds, you decelerate by 5 mph/s. In the next 5 seconds, remain at a constant speed. In the last 5 seconds, you decelerate by 10 mph/s.
Why do Earth's plates move?
Convection currents are created in the magma in the Earth's mantle, heated by the Earth's core. This movement causes the plates on the surface to shift and move.
Draw all the Forces acting on a train traveling at a constant speed.
Gravity pointing down and Normal Force pointing up, with arrows at an equal length. Push Force and Rolling Friction pointing in opposite directions, with arrows at an equal length.
What is Newton's Second Law of Motion in terms of Acceleration?
Acceleration = Force / Mass
How do you find Terminal Velocity?
When the Force of Air Resistance becomes equal to the weight of the falling object.
In the first 3 seconds, you move from 0 to 12 mph.
In the next 3 seconds, you accelerate to 15 mph. In the next 3 seconds, you accelerate to 30 mph. In the last 3 seconds, you decelerate to 6 mph.
Cortez will show the graph.
What are the 3 things acceleration can refer to?
Increasing speed, decreasing speed, or changing direction.
Draw all the Forces acting on a train that is accelerating.
Gravity pointing down and Normal Force pointing up, with arrows at an equal length. Push Force and Rolling Friction pointing in opposite directions, with the Push Force arrow being longer than the Rolling Friction arrow.
What are the 2 things I can do to increase acceleration, according to Newton's Second Law of Motion?
Increase the applied force or decrease the mass
When you throw a ball horizontally and drop a ball straight down, which will hit the ground first?
They will both hit the ground at the same time