2015 #4 Free Response Question - AP Physics 1 - Exam Solution

The video tutorial covers a physics problem from the 2015 AP Physics exam, involving two spheres released from the same height. Sphere A has no initial velocity, while Sphere B has an initial horizontal velocity. Despite different horizontal distances traveled, both spheres land simultaneously due to gravity being the only acting force. The tutorial includes drawing free body diagrams, graphing horizontal velocities, and explaining the physics behind the simultaneous landing.

What is the initial condition of Sphere A when it is released?

• It has an initial horizontal velocity.

• It has an initial vertical velocity.

• It has no initial velocity.

• It has an initial velocity in both directions.

Which force is acting on both spheres after they are released?

• Friction

• Air resistance

• Gravity

• Tension

Why is the velocity V not added to the free body diagram of Sphere B?

• Because it is balanced by another force.

• Because it is not a force.

• Because it is a vertical force.

• Because it is negligible.

What is the horizontal velocity of Sphere A throughout its motion?

• It increases over time.

• It decreases over time.

• It remains zero.

• It changes direction.

Why do both spheres reach the ground at the same time?

• Because they have the same horizontal velocity.

• Because they have the same vertical acceleration due to gravity.

• Because they have different masses.

• Because they experience air resistance.