Circular Motion and Gravitation

Front

What is the force that acts on an object moving in a circular path, directed towards the center of the circle?

Back

Centripetal force

Front

Which stars in a rotating galaxy move the fastest?

Back

Stars furthest from the center

Front

What is the term for the tendency of an object to resist changes in its state of motion, which keeps water in a swinging bucket?

Back

Inertia

Front

What is the term for the time taken for one complete revolution in circular motion?

Back

Period

Front

What is the relationship between the radius of a circular path and the speed of an object moving in that path?

Back

The speed increases with a larger radius if the centripetal force remains constant.

Front

What is the formula for centripetal acceleration?

Back

a_c = v^2 / r, where v is the linear speed and r is the radius.

Front

What happens to the centripetal force if the speed of an object in circular motion is doubled?

Back

The centripetal force increases by a factor of four.

Front

What is the gravitational force between two objects dependent on?

Back

The mass of the objects and the distance between their centers.

Front

What is the formula for gravitational force?

Back

F = G * (m1 * m2) / r^2, where G is the gravitational constant.

Front

What is the effect of gravity on an object in free fall?

Back

It accelerates the object downwards at approximately 9.81 m/s².