Pre-Test Speed and Velocity Quiz

What is the difference between speed and velocity?

• Speed and velocity are the same thing.

• Speed is measured in meters per second, velocity is measured in kilometers per hour.

• Speed is scalar, velocity is vector.

• Speed is a physical quantity, velocity is a mental concept.

Is speed a scalar or a vector quantity?

• direction

• magnitude

• vector

• scalar

Is velocity a scalar or a vector quantity?

• speed

• magnitude

• scalar

• vector

Define instantaneous speed.

• The average speed of an object over a period of time.

• The maximum speed an object can reach.

• The speed of an object at a specific point in time.

• The speed of an object at rest.

Define scalar quantity.

• A scalar quantity is a physical quantity that has direction but no magnitude.

• A scalar quantity is a physical quantity that has both magnitude and direction.

• A scalar quantity is a physical quantity that has neither magnitude nor direction.

• A scalar quantity is a physical quantity that has magnitude but no direction.

Define vector quantity.

• A vector quantity is a physical quantity that has only magnitude.

• A vector quantity is a physical quantity that has only direction.

• A vector quantity is a physical quantity that has both magnitude and direction.

• A vector quantity is a physical quantity that has neither magnitude nor direction.

Can an object have constant speed but changing velocity? Explain.

• No, constant speed and changing velocity are mutually exclusive.

• Yes

• No, an object's speed and velocity are always the same.

• No, if an object has constant speed, its velocity must also be constant.

Can an object have constant velocity but changing speed? Explain.

• No, constant velocity means constant speed.

• No, velocity and speed are the same thing.

• No, changing speed means changing velocity.

• Yes

If an object is moving in a straight line with constant speed, what can you say about its velocity?

• Constant

• Increasing

• Decreasing

• Zero

If an object is moving in a straight line with changing speed, what can you say about its velocity?

• The velocity of the object is changing.

• The velocity of the object is negative.

• The velocity of the object is zero.

• The velocity of the object is constant.