Understanding Forces

What is a contact force?

• A contact force is a force that only acts on stationary objects.

• A contact force is a force that acts between two objects that are in direct physical contact.

• A contact force is a force that acts at a distance without physical contact.

• A contact force is a type of energy that can be stored in objects.

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 the difference between frictional and normal force?

• Normal force acts in the direction of motion.

• Frictional force is a type of normal force.

• Frictional force opposes motion; normal force supports weight.

• Frictional force is always greater than normal force.

Explain the concept of tension force.

• Tension force is a static force that does not change with movement.

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

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

• Tension force is the force exerted by gravity on an object.

What are the characteristics of magnetic force?

• Magnetic force attracts or repels, has directionality, depends on distance, influences charged particles, and acts at a distance.

• Magnetic force is always equal in strength regardless of distance.

• Magnetic force can only act on stationary objects.

• Magnetic force only attracts objects with the same charge.