Question

which of the following birds are accelerating? select all that apply. a cardinal that is flying up into the sky with increasing speed a hummingbird that is slowing down as it flies into the wind a vulture that is flying in a circle at a constant speed

Explanation:

Step1: Recall acceleration definition

Acceleration is a change in velocity. Velocity is a vector with magnitude (speed) and direction.

Step2: Analyze vulture case

A vulture flying in a circle at a constant speed has a changing - direction of velocity. So, it is accelerating.

Step3: Analyze humming - bird case

A hummingbird slowing down has a change in the magnitude of its velocity. So, it is accelerating.

Step4: Analyze cardinal case

A cardinal flying up into the sky with increasing speed has a change in the magnitude of its velocity. So, it is accelerating.

Answer:

A vulture that is flying in a circle at a constant speed, a hummingbird that is slowing down as it flies into the wind, a cardinal that is flying up into the sky with increasing speed