Forces and Newton's Laws

Front

What does Newton's 1st Law state about an object's motion?

Back

An object at rest stays at rest, and an object in motion stays in motion with the same speed and in the same direction unless acted upon by a net external force.

Front

What is Newton's 2nd Law of Motion?

Back

The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass (F = ma).

Front

What is Newton's 3rd Law of Motion?

Back

For every action, there is an equal and opposite reaction.

Front

What is the unit of force in the International System of Units (SI)?

Back

Newton (N).

Front

What is the definition of friction force?

Back

Friction force is the force that opposes the relative motion of two surfaces in contact.

Front

What is the normal force?

Back

The normal force is the force exerted by a surface to support the weight of an object resting on it, acting perpendicular to the surface.

Front

What is the formula for calculating weight?

Back

Weight (W) is calculated as W = mg, where m is mass and g is the acceleration due to gravity.

Front

What is the acceleration due to gravity on Earth?

Back

Approximately 9.81 m/s².

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, while weight is the force exerted by gravity on that mass.

Front

What is the role of net force in determining an object's motion?

Back

Net force is the vector sum of all forces acting on an object, determining its acceleration and direction of motion.