Forces and Motion of Spheres

The video tutorial explains the motion of two identical spheres released from the same height. Sphere A falls straight down, while Sphere B has an initial horizontal velocity. Despite different paths, both spheres hit the ground simultaneously due to identical vertical acceleration. The tutorial includes a free body diagram, a graph of horizontal velocities, and a detailed explanation of the physics involved.

What is the initial condition of sphere A when released?

• It has an initial vertical velocity.

• It has an initial horizontal velocity.

• It has both horizontal and vertical velocities.

• It has no initial velocity.

What is the only force acting on the spheres during their flight?

• Air resistance

• Magnetic force

• Gravity

• Friction

What is the effect of air resistance on the spheres?

• It speeds up sphere B.

• It causes both spheres to stop.

• It slows down sphere A.

• It is negligible.

How does the horizontal velocity of sphere B change during its flight?

• It remains constant.

• It increases steadily.

• It decreases steadily.

• It fluctuates randomly.

What is the horizontal velocity of sphere A throughout its flight?

• It decreases over time.

• It is equal to v0.

• It is zero.

• It increases over time.

What is the initial horizontal velocity of sphere B?

• v0/2

• 2v0

• v0

• Zero

What happens to the horizontal velocity of sphere B when it hits the ground?

• It becomes zero.

• It doubles.

• It reverses direction.

• It remains the same.

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

• Air resistance affects both equally.

• They have the same horizontal velocity.

• They have the same vertical acceleration and distance to cover.

• Sphere B is faster in the horizontal direction.

What is the relationship between the vertical velocities of the spheres during their flight?

• Sphere A has a greater vertical velocity.

• Sphere B has a greater vertical velocity.

• Their vertical velocities are unrelated.

• Both have the same vertical velocity.

What is the significance of the horizontal distance covered by sphere B?

• It affects the time to hit the ground.

• It does not affect the time to hit the ground.

• It makes sphere B hit the ground first.

• It makes sphere A hit the ground first.