Forces and Motion

Front

What are the two fundamental types of interactions between objects that can cause a change in motion?

Back

Contact forces and noncontact forces.

Front

What is a contact force?

Back

An interaction between objects due to direct contact with each other.

Front

What is a noncontact force?

Back

An interaction between two objects that are separated by some distance.

Front

Why are noncontact forces also called field forces?

Back

Because they result from objects exerting influence through the space around themselves.

Front

What is the gravitational force?

Back

The noncontact attractive interaction between two objects having mass.

Front

What keeps the moon in orbit around Earth?

Back

Gravity.

Front

What is weight?

Back

The downward force experienced by objects resulting from their gravitational attraction to Earth.

Front

How can weight be represented mathematically?

Back

As the force exerted by Earth on the mass (FEM), or simply as W.

Front

What happens when you bounce a basketball against the floor?

Back

The ball’s motion changes, but the floor’s motion does not seem to change.

Front

What is deformation in the context of forces?

Back

A change in shape due to the application of a force.