Forces in Physics

Questions and Answers

The total force acting on an object when multiple forces are applied (correct)

The force that maintains an object in its state of motion

The gravitational force pulling an object downwards

The force exerted by friction opposing motion

Normal force

Tension force

Frictional force

Gravitational force (correct)

It will move randomly

It will start moving on its own

It will accelerate steadily

It will stay at rest until a force acts on it (correct)

The relationship between force, mass, and acceleration Signup and view all the answers

The resultant force acting on an object is zero Signup and view all the answers

Greater mass requires more force to produce given acceleration Signup and view all the answers

Third Law Signup and view all the answers

Its mass and the gravitational field strength Signup and view all the answers

Study Notes

Contact Forces: Forces that act through physical contact between objects. Examples:
- Frictional force
- Normal force
- Tension force
Non-Contact Forces: Forces that act without physical contact between objects. Examples:
- Gravitational force
- Electromagnetic force
- Nuclear force

Vector Quantity: Forces have both magnitude (amount of force) and direction.
Resultant Force: The net force acting on an object when multiple forces are applied.
Equilibrium: When the resultant force acting on an object is zero, resulting in no acceleration.

First Law (Law of Inertia): An object at rest will remain at rest, and an object in motion will continue to move with a constant velocity, unless acted upon by an external force.
Second Law (F = ma): The force applied to an object is equal to the mass of the object multiplied by its acceleration.
Third Law (Action and Reaction): For every action, there is an equal and opposite reaction.

Force and Acceleration: Force is required to change the velocity of an object.
Force and Velocity: The direction of the force determines the direction of the acceleration.
Force and Mass: The more massive an object, the more force is required to produce a given acceleration.

Universal Gravitational Force: A force that attracts two objects with mass towards each other.
Weight: The gravitational force acting on an object, dependent on its mass and the gravitational field it is in.

Contact forces occur through physical contact between objects, including frictional, normal, and tension forces.
Non-contact forces occur without physical contact, including gravitational, electromagnetic, and nuclear forces.

Forces have magnitude (amount of force) and direction, making them vector quantities.
The resultant force is the net force acting on an object when multiple forces are applied.
Equilibrium occurs when the resultant force acting on an object is zero, resulting in no acceleration.

The First Law (Law of Inertia) states that an object at rest will remain at rest, and an object in motion will continue to move with a constant velocity, unless acted upon by an external force.
The Second Law (F = ma) states that the force applied to an object is equal to the mass of the object multiplied by its acceleration.
The Third Law (Action and Reaction) states that for every action, there is an equal and opposite reaction.

Force is required to change the velocity of an object.
The direction of the force determines the direction of the acceleration.
The more massive an object, the more force is required to produce a given acceleration.

The universal gravitational force attracts two objects with mass towards each other.
Weight is the gravitational force acting on an object, dependent on its mass and the gravitational field it is in.