5 - Gravity & Circular Motion | Exam Review

Front

What is gravity?

Back

Gravity is a force that attracts two bodies towards each other, proportional to their masses and inversely proportional to the square of the distance between their centers.

Front

What is centripetal force?

Back

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

Front

What happens to the gravitational force between two objects if the distance between them is tripled?

Back

The gravitational force decreases to one-ninth (F/9) of its original value.

Front

What is the formula for gravitational force?

Back

F = G * (m1 * m2) / r^2, where G is the gravitational constant, m1 and m2 are the masses of the objects, and r is the distance between their centers.

Front

What role does friction play in circular motion on a banked curve?

Back

Friction provides additional centripetal force needed to keep the car moving in a circular path, along with the normal force.

Front

What is the direction of velocity in circular motion?

Back

The velocity of an object in circular motion is tangent to the circle at any point.

Front

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

Back

Centripetal force increases with the square of the speed; if speed doubles, the required centripetal force increases by a factor of four.

Front

What is the effect of mass on gravitational force?

Back

The gravitational force increases with the mass of the objects; more massive objects exert a stronger gravitational pull.

Front

What is the significance of the normal force in circular motion?

Back

The normal force acts perpendicular to the surface and can contribute to the centripetal force when an object is on a banked curve.

Front

How does the path of an object change when it is released from circular motion?

Back

When released, the object will move in a straight line tangent to the circular path at the point of release.