Understanding Forces

What is a force?

• A force is a physical object that remains stationary.

• A force is a type of energy that cannot be measured.

• A force is an interaction that causes an object to change its motion.

• A force is a measurement of an object's weight.

What are the two main categories of forces?

• Balanced forces and unbalanced forces

• Frictional forces and gravitational forces

• Contact forces and non-contact forces

• Static forces and dynamic forces

Define gravitational force.

• Gravitational force is the force that acts only on objects in space.

• Gravitational force is the energy produced by a mass in motion.

• Gravitational force is the force of attraction between two masses.

• Gravitational force is the force that repels two masses.

What is frictional force?

• Frictional force is the force that acts only in a vacuum between two surfaces.

• Frictional force is the force that enhances the motion of two surfaces in contact.

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

• Frictional force is the force that pulls two surfaces apart when they are in contact.

Explain the concept of tension force.

• Tension force is a pulling force transmitted through a flexible connector, acting along its length.

• Tension force is the force that pushes objects apart.

• Tension force only occurs in solid materials without any connectors.

• Tension force is a compressive force acting on rigid objects.

What is the difference between contact and non-contact forces?

• Contact forces are always stronger than non-contact forces.

• Contact forces involve direct interaction; non-contact forces operate at a distance.

• Contact forces can only be observed in liquids.

• Non-contact forces require physical touch to act.

Give an example of a non-contact force.

• Gravitational force

• Tension force

• Frictional force

• Magnetic force

What is the role of air resistance in motion?

• Air resistance only affects objects at rest.

• Air resistance has no effect on motion.

• Air resistance increases the speed of moving objects.

• Air resistance slows down moving objects and affects their motion.

Describe the characteristics of magnetic force.

• Magnetic force is a non-contact force that can attract or repel, is direction-dependent, diminishes with distance, and is influenced by the strength of the magnetic field.

• Magnetic force is always a contact force.

• Magnetic force only attracts and does not repel.

• Magnetic force is constant regardless of distance.

How does applied force affect the motion of an object?

• Applied force changes the motion of an object by causing it to accelerate or change direction.

• Applied force makes an object float in the air.

• Applied force has no effect on an object's motion.

• Applied force only affects the object's color.