Kinematics Middle School

1. What is the difference between speed and velocity?

• Speed is scalar; velocity is vector (includes direction).
• Speed is a vector; velocity is a scalar.
• Speed measures distance; velocity measures time.
• Speed is always constant; velocity can change.

What is the name of the size of a vector? (Hint: it is how big or small a value is.)

• Magnitude
• Position
• Direction
• Length

What is an instant in physics?

• An instant in physics is a specific point in time with no duration.
• An instant in physics refers to a moment that can be measured in seconds.
• An instant in physics is a long duration of time.
• An instant in physics is a continuous flow of time.

What does "delta time" mean?

• Delta time is the time interval between two points in time.
• Delta time indicates the temperature change over time.
• Delta time is a measurement of distance traveled.
• Delta time refers to the speed of a moving object.

What does "delta x" mean?

• Delta x indicates the average of x.
• Delta x is a constant value of object's position.

• 'Delta x' means a change in the objetc's position.

• Delta x refers to the maximum value of x.

What is the equation for displacement in one dimension?

• displacement = x_i + x_f

• displacement = x_f - x_i

• displacement= x_f \times x_i

• Displacement = x_f / x_i

What is the equation for the magnitude of displacement in two dimensions?

• D = Δx + Δy
• D = √(Δx² + Δy²)
• D = Δx - Δy
• D = Δx / Δy

What is motion?

• Motion is the change in position of an object over time.
• Motion is the color of an object in space.
• Motion is the speed of an object at rest.
• Motion is the force applied to an object.

What is a reference frame?

• A reference frame is a style of painting.
• A reference frame is a method for cooking food.
• A reference frame is a coordinate system for measuring positions and motions of objects.
• A reference frame is a type of physical object.

If the calculated velocity of an object is negative, what does it mean?

• It indicates the object is accelerating.
• It shows the object is moving faster.
• It means the object is moving in the opposite direction.
• It means the object is at rest.