Mass and Velocity

Front

Force Noun

---

[fors]

Back

Force

---

A push or pull upon an object resulting from the object's interaction with another object, causing changes in velocity.

---

Example: A person pushing a box demonstrates a force, which is a push or a pull that can make an object move.

Front

Mass Noun

---

[mas]

Back

Mass

---

A measure of the amount of matter in an object, which determines its inertia and resistance to being accelerated.

---

Example: This image shows a triple-beam balance, a scientific tool used to measure mass, which is the amount of matter in an object, in units of grams.

Front

Velocity Noun

---

[vuh-los-i-tee]

Back

Velocity

---

The rate of change of an object's position with respect to a frame of reference, including both speed and direction.

---

Example: This image shows that velocity is an object's speed in a specific direction, represented by the straight path from Point A to Point B.

Front

Exert Verb

---

[ig-zurt]

Back

Exert

---

To apply a force, pressure, or influence on an object, causing a potential change in its state of motion.

---

Example: Gravity exerts a downward force on the ball, causing it to roll down the ramp.

Front

Collision Noun

---

[kuh-lizh-uhn]

Back

Collision

---

An event where two or more objects come into contact and exert significant forces on each other during a short time.

---

Example: Two objects moving towards each other and striking, as shown by the arrows and impact marks, demonstrates a collision.

Front

Friction Noun

---

[frik-shuhn]

Back

Friction

---

A force that resists the relative motion or tendency of such motion between two surfaces that are in contact.

---

Example: This diagram shows that friction is a force that pushes back against the direction an object is being moved, caused by surfaces rubbing together.

Front

Reference Frame Noun

---

[ref-er-uhns freym]

Back

Reference Frame

---

A coordinate system or a set of axes used as a basis to describe the position and motion of objects.

---

Example: This image shows how motion is measured differently depending on your point of view (your reference frame), like for the person standing still versus the person on the moving train.