Unit 4 Circular & Gravitation

Front

What is the acceleration of an object in uniform circular motion?

Back

The acceleration is directed toward the center of the circular path.

Front

What does it mean that every object in the universe attracts every other object?

Back

This statement reflects the law of universal gravitation, which states that all masses exert an attractive force on each other.

Front

In uniform circular motion, how does the direction of acceleration relate to the velocity vector?

Back

The direction of the acceleration is directed toward the center of the circular path, while the velocity vector is tangent to the circular path.

Front

What do red arrows typically represent in a diagram of circular motion?

Back

The red arrows represent the velocity vector of the object in motion.

Front

When a motorcycle drives in circles, how do the velocity and centripetal force vectors relate?

Back

The velocity and centripetal force vectors are perpendicular to each other.

Front

Define centripetal force.

Back

Centripetal force is the net force that acts on an object moving in a circular path, directed toward the center of the circle.

Front

What is gravitational force?

Back

Gravitational force is the attractive force between two masses, proportional to the product of their masses and inversely proportional to the square of the distance between their centers.

Front

What is uniform circular motion?

Back

Uniform circular motion is the motion of an object traveling at a constant speed along a circular path.

Front

What is the relationship between speed and centripetal acceleration in circular motion?

Back

Centripetal acceleration increases with the square of the speed of the object.

Front

What happens to the acceleration of an object if it moves faster in a circular path?

Back

The acceleration increases as the speed increases, since centripetal acceleration is proportional to the square of the speed.