Forces and Newton's laws - Study Guide

Front

What is the net force if two forces of 3 N and 3 N are acting in the same direction?

Back

6 N

Front

What does Newton's 1st Law state?

Back

An object at rest stays at rest, and an object in motion stays in motion unless acted upon by a net external force.

Front

What is an example of Newton's 2nd Law?

Back

F = ma (Force equals mass times acceleration). If a 2 kg object accelerates at 3 m/s², the force is 6 N.

Front

What is the definition of unbalanced forces?

Back

Forces that cause a change in the motion of an object.

Front

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

Back

Contact forces require physical contact between objects, while non-contact forces act at a distance.

Front

What is an example of a contact force?

Back

Friction between two surfaces.

Front

What is an example of a non-contact force?

Back

Gravity.

Front

What does Newton's 3rd Law state?

Back

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

Front

What is inertia?

Back

The tendency of an object to resist changes in its state of motion.

Front

How do you calculate net force when forces are acting in opposite directions?

Back

Subtract the smaller force from the larger force.