Physics Semester 1 review

Front

What is Newton's 1st Law of Motion?

Back

An object at rest stays at rest and an object in motion stays in motion unless acted upon by an unbalanced force.

Front

What is the definition of a period in physics?

Back

The time taken for one complete cycle of motion.

Front

What causes acceleration in an object?

Back

Acceleration occurs when an object speeds up, slows down, or changes direction.

Front

Which lines on a graph represent constant acceleration?

Back

Lines A, B, and D represent constant acceleration.

Front

What is wrong with a free-body diagram showing an object being pushed at constant speed?

Back

The applied force should be the same size as the friction force.

Front

What is the formula for calculating acceleration?

Back

Acceleration = (Final Velocity - Initial Velocity) / Time.

Front

What is the difference between speed and velocity?

Back

Speed is a scalar quantity (magnitude only), while velocity is a vector quantity (magnitude and direction).

Front

What is the definition of force in physics?

Back

A push or pull on an object that can cause it to accelerate.

Front

What is the unit of force?

Back

The unit of force is the Newton (N).

Front

What does a free-body diagram represent?

Back

A free-body diagram shows all the forces acting on an object.