AP Physics C: Kinematics Review (Mechanics)

The video covers the Physics C mechanics curriculum, focusing on kinematics, vectors, scalars, and unit conversions. It explains uniformly accelerated motion (UAM) and its equations, freefall, and the use of graphs to represent motion. The video also discusses component and unit vectors, relative velocity, and projectile motion, providing a comprehensive review of these topics.

What is the primary difference between a vector and a scalar quantity?

• Scalars have direction only.

• Vectors have both magnitude and direction.

• Scalars have both magnitude and direction.

• Vectors have magnitude only.

How do you calculate average velocity?

• Derivative of velocity with respect to time.

• Change in velocity over change in time.

• Derivative of position with respect to time.

• Change in position over change in time.

What is the acceleration of an object in freefall on Earth?

• 0 meters per second squared.

• -9.81 meters per second squared.

• 9.81 meters per second squared upward.

• 9.81 meters per second squared downward.

In a freefall scenario, what does the position vs. time graph look like?

• A concave down curve.

• A horizontal line.

• A straight line with a positive slope.

• A concave up curve.

What is the purpose of unit vectors in vector addition?

• To eliminate the need for vector components.

• To simplify vector addition by focusing on individual components.

• To make vector addition more complex.

• To convert vectors into scalars.

How do you determine the component vectors of a vector given its magnitude and angle?

• Use tangent for both components.

• Use cosine for the X component and sine for the Y component.

• Use sine for the X component and cosine for the Y component.

• Use the Pythagorean theorem.

What is the relative velocity of an object?

• The velocity of an object with respect to itself.

• The velocity of an object with respect to the ground.

• The velocity of an object with respect to another moving object.

• The velocity of an object with respect to a stationary observer.

In projectile motion, what is the acceleration in the X direction?

• Depends on the initial velocity.

• 9.81 meters per second squared.

• -9.81 meters per second squared.

• 0 meters per second squared.

What is the key variable that connects the X and Y directions in projectile motion?

• Time

• Displacement

• Velocity

• Acceleration

What is the general strategy for solving projectile motion problems?

• List known values and solve for velocity.

• List known values and solve for acceleration.

• List known values separately for X and Y directions and solve using time.

• List known values and solve for time.