Forces

Front

What is inertia?

Back

Inertia is an object's resistance to change its motion. It is the tendency of an object to remain at rest or in uniform motion unless acted upon by an external force.

Front

What is the formula to calculate mass from the force of gravity?

Back

Mass (kg) = Force of gravity (N) / Acceleration due to gravity (9.8 m/s²). For example, if the force of gravity is 250 N, the mass is 250 N / 9.8 m/s² = 25.5 kg.

Front

If an object is at rest, what is the net force acting on it?

Back

The net force is 0. An object at rest has no unbalanced forces acting on it.

Front

What can be inferred if the net force acting on an object is zero?

Back

The object is either at rest or moving at a constant velocity.

Front

What does it mean if an object is accelerating?

Back

If an object is accelerating, it means that there is a net force acting on it, causing it to change its velocity.

Front

What is the relationship between force, mass, and acceleration?

Back

This relationship is described by Newton's second law: Force (F) = Mass (m) × Acceleration (a).

Front

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

Back

The unit of force is the Newton (N).

Front

What is gravitational force?

Back

Gravitational force is the attractive force between two masses. It is proportional to the product of their masses and inversely proportional to the square of the distance between their centers.

Front

What is the effect of balanced forces on an object?

Back

Balanced forces do not change the motion of an object. The object remains at rest or continues to move at a constant velocity.

Front

What is the effect of unbalanced forces on an object?

Back

Unbalanced forces cause an object to accelerate, changing its speed or direction.