Force and Motion
What is the definition of force?
A push or pull that can change the position or motion of an object or material.
What is acceleration?
The rate at which an object changes its velocity.
What does Newton's First Law state?
An object at rest will stay at rest, and an object in motion will stay in motion unless acted upon by an outside net force.
What are unbalanced forces?
Unequal forces acting on an object may result in a change in position, direction, or motion.
How is mass defined in physics?
A measurement of the amount of matter in a sample.
What is friction?
A force that opposes the motion of an object.
How can an object's acceleration change?
An object's acceleration can change if there is a change in speed or direction.
Explain Newton's Second Law in simple terms.
An object will accelerate in the direction of the force applied, depending on its mass.
Can you provide an example of balanced forces?
A book resting on a table, where the force of gravity is balanced by the normal force from the table.
What unit is mass typically measured in?
Kilograms (kg).
What is the difference between speed and velocity?
Speed is the distance traveled per unit of time, while velocity includes direction (speed in a specific direction).
What is the relationship between force, mass, and acceleration according to Newton's Second Law?
The relationship is described by the formula (F = ma), meaning force equals mass times acceleration.
What is Newton's Third Law?
For every action, there is an equal and opposite reaction.
What happens when unbalanced forces act on an object?
The object will accelerate in the direction of the greater force.
Define net force.
The total forces exerted on an object, measured in Newtons (N).
What do we call forces that act in opposite directions with equal strength?
Balanced forces.
In what ways can acceleration be demonstrated?
Through experiments with toy cars on ramps, measuring how different forces affect their speed.
Give an example of Newton’s Third Law in action.
When you push against a wall, the wall pushes back with equal force.
How can we observe balanced forces in everyday life?
Watching a stationary car that is not moving despite wind or other forces acting on it.
How do you calculate net force?
By adding all the forces acting on an object together, taking direction into account.
How does gravity affect the motion of an object?
Gravity pulls objects toward each other, affecting their motion and velocity.
How does mass affect acceleration?
An object with more mass will accelerate less than an object with less mass when the same force is applied.
How can we demonstrate Newton's Laws in a classroom setting?
Using a skateboard and a friend to push each other, showing action and reaction forces.
What would happen if balanced forces were applied to a moving object?
The object would continue to move at a constant speed in a straight line without changing direction.
What is the relationship between net force and acceleration?
The net force acting on an object is equal to the mass of the object multiplied by its acceleration ((F = ma)).