Understanding Scalars and Vectors

What is the main difference between a scalar quantity and a vector quantity?

• A scalar has only size, while a vector has both size and direction.

• A scalar has only direction, while a vector has both size and direction.

• A scalar has both size and direction, while a vector has only size.

• A scalar is a type of measurement, while a vector is a type of force.

Which of the following is a scalar quantity?

• Velocity

• Displacement

• Speed

• Acceleration

How is velocity different from speed?

• Velocity measures how fast an object is moving, while speed measures its direction.

• Velocity includes both how fast an object is moving and its direction, while speed only measures how fast.

• Velocity is a scalar quantity, while speed is a vector quantity.

• Velocity is always greater than speed.

On a displacement-time graph, what does the horizontal (x) axis usually represent?

• Displacement in meters

• Velocity in m/s

• Time in seconds

• Acceleration in m/s²

What does a horizontal line on a displacement-time graph indicate about an object's movement?

• The object is moving at a constant speed.

• The object is accelerating.

• The object is stationary.

• The object is moving backward.