Force and Motion Study Guide

Front

Newton's 2nd Law

Back

The acceleration of an object is dependent on its mass and the force applied (F = ma).

Front

Unbalanced Forces

Back

Forces that are not equal, causing a change in motion.

Front

Net Force

Back

The overall force acting on an object after all forces are combined.

Front

Friction

Back

A force that opposes motion between two surfaces in contact.

Front

Gravity

Back

The force that pulls objects towards each other, particularly towards Earth’s center.

Front

Air Resistance

Back

A type of frictional force that acts against the motion of objects as they move through the air.

Front

Effect of Mass on Motion (8PS2.4)

Back

More massive objects are harder to accelerate or decelerate.

Front

Scenario: Car and Truck

Back

A car and a truck moving at the same speed are subjected to the same braking force. The truck takes longer to stop due to higher inertia.

Front

Newton’s 3rd Law Application (8PS2.5)

Back

This is how rockets launch into space; the expelling gas pushes against the rocket, and the rocket moves in the opposite direction.

Front

Example: Swimmer and Pool Wall

Back

A swimmer pushes against the wall of a pool. The wall pushes back with an equal and opposite force, allowing the swimmer to move forward.