forces physics Flashcards
What is the definition of force in physics?
A force is an interaction that causes an object to change its velocity, direction, or shape.
What is the formula for calculating force?
Force is calculated using the formula F = ma, where F is force, m is mass, and a is acceleration.
True or False: Force is a scalar quantity.
False: Force is a vector quantity.
What unit is force measured in?
Force is measured in Newtons (N).
Fill in the blank: The gravitational force acting on an object is also known as its _____ force.
weight
What is the difference between mass and weight?
Mass is the amount of matter in an object, while weight is the force exerted by gravity on that mass.
What are the two types of forces?
Contact forces and non-contact forces.
What is friction?
Friction is a force that opposes the motion of an object in contact with a surface.
True or False: The normal force acts perpendicular to the surface of contact.
True
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 a net external force.
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.
What is Newton’s Third Law of Motion?
For every action, there is an equal and opposite reaction.
Fill in the blank: A force that acts at a distance without physical contact is called a _____ force.
non-contact
What is tension in the context of forces?
Tension is the force transmitted through a string, rope, or cable when it is pulled tight.
What is the formula for gravitational force between two objects?
The formula is F = G(m1*m2)/r^2, where F is the gravitational force, G is the gravitational constant, m1 and m2 are the masses, and r is the distance between their centers.
True or False: Air resistance is a type of friction.
True
What is the concept of equilibrium in forces?
Equilibrium occurs when the net force acting on an object is zero, resulting in no acceleration.
What does the term ‘net force’ mean?
Net force is the vector sum of all forces acting on an object.
What is a vector quantity?
A vector quantity is a quantity that has both magnitude and direction.
What is a scalar quantity?
A scalar quantity is a quantity that has only magnitude and no direction.
Fill in the blank: The force that pulls objects toward the center of the Earth is known as _____ force.
gravitational
What is centripetal force?
Centripetal force is the force that keeps an object moving in a circular path, directed towards the center of the circle.
What is the relationship between force and acceleration?
Force and acceleration are directly related; as force increases, acceleration increases if mass remains constant.
True or False: A larger mass will always experience a greater force.
False: Force depends on both mass and acceleration.
