Force and Motion

Front

What is Newton's Second Law of Motion?

Back

Newton's Second Law of Motion states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. This can be expressed with the formula F = ma, where F is force, m is mass, and a is acceleration.

Front

How does weight differ from mass?

Back

Weight is the force exerted by gravity on an object, which can change depending on the gravitational field strength (e.g., Earth vs. Moon). Mass is the amount of matter in an object and remains constant regardless of location.

Front

What is an unbalanced force?

Back

An unbalanced force is a net force acting on an object that causes it to accelerate. It occurs when the forces acting on an object are not equal in size and opposite in direction.

Front

What is the principle of action and reaction?

Back

The principle of action and reaction, also known as Newton's Third Law of Motion, states that for every action, there is an equal and opposite reaction. This means that forces always occur in pairs.

Front

Define force in physics.

Back

A force is defined as a push or pull exerted on an object, which can cause it to change its velocity (accelerate), direction, or shape.

Front

What is inertia?

Back

Inertia is the tendency of an object to resist changes in its state of motion. An object at rest stays at rest, and an object in motion stays in motion unless acted upon by an unbalanced force.

Front

What factors affect the gravitational force between two objects?

Back

The gravitational force between two objects is affected by their masses and the distance between them. According to Newton's Law of Universal Gravitation, the force increases with greater mass and decreases with greater distance.

Front

What is the difference between speed and velocity?

Back

Speed is a scalar quantity that refers to how fast an object is moving, while velocity is a vector quantity that includes both speed and direction.

Front

What is friction?

Back

Friction is a force that opposes the motion of an object. It occurs when two surfaces come into contact and can vary in strength depending on the nature of the surfaces and the force pressing them together.

Front

How does mass affect acceleration when a constant force is applied?

Back

According to Newton's Second Law, if a constant force is applied to an object, an increase in mass will result in a decrease in acceleration, as acceleration is inversely proportional to mass.