Forces Flashcards
What is the definition of force?
A force is a push or pull acting upon an object.
What is the SI unit of force?
The SI unit of force is the Newton (N).
True or False: Force is a scalar quantity.
False: Force is a vector quantity.
What is the formula to calculate force?
Force is calculated using the formula F = ma, where F is force, m is mass, and a is acceleration.
Fill in the blank: The force of gravity on an object is called its ______.
weight
What are the two types of forces?
The two types of forces are contact forces and non-contact forces.
What is a contact force?
A contact force is a force that occurs when two objects are physically touching.
Give an example of a non-contact force.
Examples of non-contact forces include gravitational force, electromagnetic force, and nuclear force.
What is friction?
Friction is a force that opposes the relative motion of two surfaces in contact.
True or False: Friction can only act in one direction.
False: Friction acts opposite to the direction of motion.
What is the role of tension in a rope?
Tension is the force transmitted through a rope when it is pulled tight by forces acting from opposite ends.
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.
Fill in the blank: The gravitational force between two objects depends on their ______ and the distance between them.
masses
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 inertia?
Inertia is the tendency of an object to resist changes in its state of motion.
What does Newton’s second law of motion state?
Newton’s second law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.
What is the formula for acceleration in relation to force and mass?
Acceleration (a) can be calculated using the formula a = F/m.
What is Newton’s third law of motion?
For every action, there is an equal and opposite reaction.
True or False: Action and reaction forces act on the same object.
False: Action and reaction forces act on different objects.
What is net force?
Net force is the vector sum of all the forces acting on an object.
Fill in the blank: When the net force on an object is zero, the object is said to be in ______.
equilibrium
What is the difference between static and kinetic friction?
Static friction acts on an object at rest, while kinetic friction acts on an object in motion.
What is the principle of superposition in forces?
The principle of superposition states that the total force acting on an object is the vector sum of all individual forces acting on it.
What is centripetal force?
Centripetal force is the force that keeps an object moving in a circular path.
