Net Force
What is net force?
The overall force acting on an object when all individual forces are combined.
What is acceleration?
The rate of change of velocity of an object over time.
What is mass?
The amount of matter in an object.
How do seatbelts relate to Newton's First Law?
They prevent passengers from continuing in motion when a vehicle stops suddenly.
What is Newton’s First Law of Motion?
An object at rest stays at rest, and an object in motion stays in motion unless acted upon by an external force.
If two forces of 5 N and 3 N act in the same direction, what is the net force?
8 N.
How do you calculate acceleration?
Acceleration = (Final Velocity - Initial Velocity) / Time.
How does mass affect acceleration when a constant force is applied?
Greater mass results in lower acceleration.
In sports, how does Newton's Third Law apply when a player pushes against the ground?
The ground exerts an equal and opposite force, propelling the player upward.
What is Newton’s Second Law of Motion?
The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.
How does increasing the net force affect the motion of an object?
It increases the acceleration of the object.
If an object accelerates at 4 m/s², how does this relate to the net force acting on it?
The net force is proportional to the mass of the object and the acceleration (F = ma).
What is the difference between mass and weight?
Mass is the amount of matter, while weight is the force of gravity acting on that mass.
How do amusement park rides demonstrate Newton's Second Law?
The net force acting on riders causes changes in their acceleration as they move through loops and turns.
What is Newton’s Third Law of Motion?
For every action, there is an equal and opposite reaction.
What happens to the net force if two equal forces act in opposite directions?
The net force is zero.
What is the unit of acceleration?
meters per second squared (m/s²).
How does mass relate to inertia?
More mass means more inertia, making it harder to change the motion of the object.
How do tectonic activities relate to Newton's laws?
The forces from tectonic plates cause movements, demonstrating all three laws in action.
Give an example of how all three laws of motion can be observed in a car crash.
Objects in the car may continue moving forward (First Law), acceleration changes due to forces (Second Law), and seatbelts apply force to keep passengers in place (Third Law).
Apply Newton's Second Law: If a 10 kg object experiences a net force of 20 N, what is its acceleration?
2 m/s².
If an object has a mass of 2 kg and accelerates at 3 m/s², what is the net force?
6 N.
If a 5 kg object experiences a net force of 15 N, what is its acceleration?
3 m/s².
How do rocket launches illustrate the principles of Newton’s laws?
Rockets push downward with exhaust gases (Third Law), resulting in upward acceleration (Second Law).
How do these laws work together in the launch and flight of a rocket?
The rocket pushes down (Third Law), accelerates upwards (Second Law), and continues its path unless acted upon by another force (First Law).