An Object Moves in a Circle at Constant Speed

question 31

Multiple Choice

An object moves in a circle at constant speed.The work done by the centripetal force is zero because:

• A)the displacement for each revolution is zero
• B)the average force for each revolution is zero
• C)there is no friction
• D)the magnitude of the acceleration is zero
• E)the centripetal force is perpendicular to the velocity

---

Definitions:

Ligaments

Strong, flexible bands of connective tissue that connect bones to other bones at joints.

Cartilage

A firm, flexible connective tissue found in various parts of the body, including the joints, rib cage, and ear.

Osteoclasts

Type of bone cell responsible for the breakdown and resorption of bone tissue, playing a crucial role in bone maintenance, growth, and repair.

Calcium

A chemical element, symbol Ca, essential for living organisms, particularly in cell physiology and bone formation.