Circular Motion Basics

What is uniform circular motion?

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

• Motion of an object in a circular path at a varying 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?

• Opposite to the velocity direction

• Tangential to the circle

• Away from the center of the circle

• Towards the center of the circle

What is the formula for centripetal acceleration?

• a = v * r

• a = v^2 / r

• a = v + r

• a = r / v

Explain the concept of centripetal force.

• Centripetal force is the force that causes an object to move in a straight line.

• Centripetal force is the force that pushes an object away from the center of rotation.

• Centripetal force is the force that keeps an object moving in a circular path.

• Centripetal force is the force that increases an object's speed in a circular path.

How does the speed of an object in uniform circular motion change?

• Speed decreases continuously

• Speed increases linearly

• Speed remains constant

• Speed oscillates periodically

What is the relationship between the radius of the circle and the centripetal force?

• Exponential relationship

• Direct relationship

• No relationship

• Inverse relationship

Define angular velocity in the context of circular motion.

• Acceleration due to gravity

• Speed of an object in circular motion

• Rate of change of linear displacement with respect to time

• Rate of change of angular displacement with respect to time

How is centripetal acceleration related to angular velocity?

• Centripetal acceleration is not related to angular velocity.

• Centripetal acceleration is directly proportional to the angular velocity.

• Centripetal acceleration is inversely proportional to the square of the angular velocity.

• Centripetal acceleration is directly proportional to the square of the angular velocity.

Explain the difference between tangential velocity and angular velocity.

• Tangential velocity is the speed of an object moving in a straight line, while angular velocity is the speed of an object moving in a circular path.

• Tangential velocity is always greater than angular velocity in any given scenario.

• Tangential velocity is linear speed along a circular path, while angular velocity is the rate of change of angular displacement.

• Tangential velocity is measured in radians per second, while angular velocity is measured in meters per second.

What is the role of friction in providing centripetal force in a car turning on a flat road?

• Friction between the car's seats and the passengers

• Friction between the car's radio and the dashboard

• Friction between the tires and the road

• Friction between the car's roof and the air