Physical Science 1st Semester Test Review

Front

What is instantaneous speed?

Back

Instantaneous speed is measured at a particular instant.

Front

What does Newton's third law of motion describe?

Back

Newton's third law of motion describes action and reaction forces.

Front

What are the forces acting on a falling leaf?

Back

The forces acting on a falling leaf are gravity and air resistance.

Front

What is the SI unit of force?

Back

The SI unit of force is the newton.

Front

How do you calculate acceleration?

Back

Acceleration is calculated by the change in speed divided by the time taken.

Front

What is the formula for calculating speed?

Back

Speed = Distance / 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 effect of balanced forces on an object?

Back

Balanced forces do not change the motion of an object.

Front

What is the role of gravity in motion?

Back

Gravity is a force that pulls objects toward the center of the Earth.

Front

What is air resistance?

Back

Air resistance is a type of friction that acts against the motion of an object moving through air.