(part 2 of 2) An Introductory Projectile Motion Problem with an Initial Horizontal Velocity

The video tutorial explores an introductory projectile motion problem, focusing on determining the final velocity of a ball with an initial horizontal velocity. It covers calculating the final velocity in the y-direction using kinematic equations, combining it with the constant x-direction velocity to find the resultant velocity, and determining the angle of motion. The tutorial emphasizes understanding vector components, the significance of direction in velocity, and the differences in motion and displacement in x and y directions.

What is the initial condition of the projectile's velocity in the y-direction?

• It is equal to the initial velocity in the x-direction.

• It is zero.

• It is equal to the final velocity in the y-direction.

• It is equal to the acceleration due to gravity.

Why is the final velocity in the y-direction negative?

• Because the ball is moving upwards.

• Because the ball is moving downwards.

• Because the initial velocity is negative.

• Because the acceleration is positive.

What is the constant velocity of the ball in the x-direction?

• 4.47 meters per second

• 3.7 meters per second

• 5.8 meters per second

• 9.81 meters per second

How do you calculate the resultant velocity of the projectile?

• By adding the velocities in the x and y directions.

• By multiplying the velocities in the x and y directions.

• By subtracting the velocity in the y-direction from the x-direction.

• By using the Pythagorean theorem on the x and y components.

What is the angle of the final velocity vector relative to the negative y-axis?

• 60 degrees

• 50 degrees

• 45 degrees

• 30 degrees

Why does the ball appear to move straight down from the perspective of the hand?

• Because both the hand and the ball have the same horizontal velocity.

• Because the ball has no horizontal motion.

• Because the hand moves faster than the ball.

• Because the ball is stationary.

How does the motion of the ball differ from the motion of the hand?

• The ball moves only in the x-direction.

• The ball moves in both x and y directions, while the hand moves only in the x-direction.

• The hand moves in both x and y directions, while the ball moves only in the x-direction.

• Both move in the same direction and distance.