Physical Science 1st Semester Revieww

Front

What is potential energy?

Back

Potential energy is the energy stored in an object due to its position or state. It is greatest when an object is at its highest point.

Front

What happens to light when it hits a mirror?

Back

Light reflects off a mirror, changing direction but not its speed.

Front

How does gravity change with distance?

Back

As the distance between two objects increases, the pull of gravity between them decreases.

Front

What is Newton's 3rd Law of Motion?

Back

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

Front

What is mechanical advantage?

Back

Mechanical advantage is the ratio of the output force produced by a machine to the input force applied to it.

Front

How do you calculate mechanical advantage?

Back

Mechanical advantage = Weight of object lifted / Weight applied to lever.

Front

What is kinetic energy?

Back

Kinetic energy is the energy of an object in motion, calculated as KE = 1/2 mv², where m is mass and v is velocity.

Front

What is the law of conservation of energy?

Back

Energy cannot be created or destroyed, only transformed from one form to another.

Front

What is the difference between speed and velocity?

Back

Speed is the distance traveled per unit of time, while velocity is speed with a direction.

Front

What is friction?

Back

Friction is the force that opposes the motion of an object when it comes into contact with another surface.