Question

which of the following dogs are accelerating? select all that apply. a toy poodle that is being lifted straight upward at a constant speed by a young boy a chihuahua that is speeding up as it chases its owner straight down the stairs a golden retriever that is running with decreasing speed straight across a muddy field

Explanation:

Acceleration is a change in velocity. Velocity is a vector quantity (has both magnitude and direction).

• For the toy poodle: Moving at a constant speed (magnitude of velocity is constant), so no acceleration.
• For the Chihuahua: Speeding up means the magnitude of velocity is changing, so there is acceleration.
• For the golden retriever: Decreasing speed means the magnitude of velocity is changing, so there is acceleration.

Answer:

A Chihuahua that is speeding up as it chases its owner straight down the stairs and a golden retriever that is running with decreasing speed straight across a muddy field.