AP Physics Unit 2-3: Dynamics & Circular Motion

Front

What is the mass of an astronaut on an alien planet if her mass on Earth is 68.5 kg?

Back

68.5 kg (Mass is invariant regardless of location).

Front

If the distance between two objects is doubled, how does the gravitational force between them change?

Back

The gravitational force becomes 4 times smaller.

Front

What is the formula for centripetal acceleration?

Back

Centripetal acceleration (a) = v²/r, where v is the velocity and r is the radius.

Front

What happens to an object in circular motion if the radius is doubled while keeping the speed constant?

Back

The centripetal acceleration is halved.

Front

What is a free body diagram (FBD)?

Back

A graphical representation showing all the forces acting on an object.

Front

Can an object be moving to the right and still have a free body diagram showing no net force in the x-direction?

Back

Yes, it could be moving at a constant velocity.

Front

What is the relationship between mass and weight?

Back

Weight (W) = mass (m) × gravitational acceleration (g).

Front

How does the gravitational force between two objects change if one object's mass is tripled?

Back

The gravitational force becomes 3 times larger.

Front

What is the acceleration of an object moving in a circle at a constant speed?

Back

The acceleration is directed towards the center of the circle (centripetal acceleration).

Front

What is the effect of increasing the speed of an object in circular motion on its centripetal acceleration?

Back

Centripetal acceleration increases with the square of the speed.