Circular Motion Basics

What is uniform circular motion?

• Motion of an object in a circular path at a varying speed.

• Motion of an object in a straight line at a constant speed.

• Motion of an object in a circular path at a constant speed.

• Motion of an object in a random path.

What is the direction of the acceleration in uniform circular motion?

• Away from the center of the circle

• Tangential to the circle

• Towards the center of the circle

• Opposite to the velocity direction

What is the relationship between the speed and radius of rotation in uniform circular motion?

• Speed decreases as the radius of rotation increases in uniform circular motion.

• Speed is not related to the radius of rotation in uniform circular motion.

• Speed is directly proportional to the radius of rotation in uniform circular motion.

• Speed is inversely proportional to the radius of rotation in uniform circular motion.

What is the formula for centripetal acceleration in uniform circular motion?

• a = v^2 / r

• a = v + r

• a = r / v

• a = v * r

Explain the concept of centripetal force in uniform circular motion.

• Centripetal force is not necessary for objects in circular motion.

• Centripetal force pushes objects away from the center of the circle.

• Centripetal force is the force that keeps an object moving in a circular path, directed towards the center of the circle.

• Centripetal force acts tangentially to the circle.

How does the centripetal force change with an increase in the mass of the object in uniform circular motion?

• The centripetal force becomes zero

• The centripetal force remains the same.

• The centripetal force decreases

• The centripetal force increases

What happens to the centripetal force if the radius of rotation is doubled?

• The centripetal force will be quadrupled.

• The centripetal force will be doubled.

• The centripetal force will be halved.

• The centripetal force will remain the same.

Discuss the role of friction in providing centripetal force in circular motion.

• The gravitational force between the object and the Earth creates centripetal force.

• Centripetal force is generated by the object's color in circular motion.

• Friction between the object and air provides centripetal force.

• Friction between the object and the surface it is moving on provides the centripetal force required for circular motion.

Explain the difference between centripetal acceleration and tangential acceleration.

• Centripetal acceleration is parallel to the circular path, while tangential acceleration is perpendicular to the circular path.

• Centripetal acceleration points towards the center of the circular path, while tangential acceleration is perpendicular to centripetal acceleration and points along the tangent of the circular path.

• Centripetal acceleration is caused by friction, while tangential acceleration is caused by gravity.

• Centripetal acceleration is always zero, while tangential acceleration varies with speed.

How does the period of rotation relate to the frequency of rotation in uniform circular motion?

• The period of rotation has no relation to the frequency of rotation.

• The period of rotation and the frequency of rotation are directly proportional.

• The period of rotation and the frequency of rotation are equal.

• The period of rotation and the frequency of rotation in uniform circular motion are inversely proportional.