E.O.C Unit 3 - Physics Test Review

Physics is the study of motion and the forces of motion

• True

• False

Answer explanation

The statement in the question is indeed true. Physics is a branch of science that primarily deals with the properties of matter and energy. It includes the study of motion (kinematics), as well as the concepts of force and gravity that drive that motion. Therefore, the correct answer is 'True'.

Motion is ________________.

• The act of moving or being moved

• One object striking another

• One object passing by another

• One object not touching another

Answer explanation

The question asks about the definition of motion. The correct answer is 'The act of moving or being moved'. This is because motion refers to the process of changing position or place, which is accurately described by this option. The other options do not accurately define what motion is.

A collision is when two objects _____________________.

• Bang into each other

• Pass by each other

• Rub against each other

• Don't touch at all

Answer explanation

The question asks what happens when two objects collide. The correct answer is that they 'Bang into each other'. This is because a collision, in the context of physics, is defined as an event where two or more bodies exert forces on each other for a relatively short period of time, typically characterized by a strong interaction.

Newton's 1st law says "Something in motion stays in motion until something stops it"

• True

• False

Answer explanation

Newton's 1st law, also known as the law of inertia, states that an object in motion will stay in motion and an object at rest will stay at rest unless acted upon by an external force. The statement 'Something in motion stays in motion until something stops it' is a simplified version of this law, making the answer true.

Newton's 3rd law of motion says "all actions have an opposite and equal reaction".

• True

• False

Answer explanation

The statement in the question is indeed true. Newton's third law of motion states that for every action, there is an equal and opposite reaction. This means that any force exerted onto a body will create a force of equal magnitude but in the opposite direction on the first object.

Gravity is a _____________ force.

• Strong

• Weak

• Both Strong and Weak

• Useless

Answer explanation

Gravity is both a strong and weak force. It is considered strong because it is responsible for holding planets, stars, and galaxies together. However, it is also considered weak when compared to other fundamental forces, such as electromagnetism, as it becomes weaker with increasing distance.