Ball Trajectory and Pendulum Motion

The video tutorial explains the motion of a pendulum at points B and C, focusing on centripetal and tangential accelerations. At point B, the pendulum has centripetal acceleration but no tangential acceleration due to no speed change. At point C, the pendulum has no centripetal acceleration as the speed is zero, but it has tangential acceleration. The tutorial also covers the trajectory of a ball thrown on a spinning merry-go-round, highlighting the effects of combined velocities and the observer's perspective on the ball's path.

What is the direction of acceleration of the pendulum bob at point B?

• Away from the center

• Downwards

• Towards the center

• Upwards

Why is there no tangential acceleration at point B of the pendulum's swing?

• Because the pendulum is at rest

• Because there is no speed change

• Because the pendulum is moving upwards

• Because the pendulum is moving downwards

What is the speed of the pendulum bob at point C?

• Half of maximum speed

• Zero

• Maximum speed

• Double the speed at point B

Why is there no centripetal acceleration at point C?

• Because the pendulum is at its lowest point

• Because the pendulum is at its highest point

• Because the speed is zero

• Because the pendulum is moving in a straight line

What type of acceleration is present at point C?

• Centripetal acceleration

• Both centripetal and tangential acceleration

• Tangential acceleration

• No acceleration

What happens to the ball's velocity when it is thrown on the merry-go-round?

• It has both the throw and merry-go-round velocities

• It has no velocity

• It only has the velocity from the merry-go-round

• It only has the velocity from the throw

How does the ball move horizontally after being thrown on the merry-go-round?

• It accelerates

• It decelerates

• It moves at a constant velocity

• It stops

From the ground observer's perspective, what is the trajectory of the ball?

• A straight line

• A curve

• A zigzag path

• A circular path

Why does the ball appear to curve for an observer on the merry-go-round?

• Because the ball is thrown upwards

• Because of the ball's slower speed relative to the floor

• Because of the ball's faster speed relative to the floor

• Because the ball is thrown downwards

What is the effect of the ball's speed relative to the floor on its trajectory?

• It causes the ball to move in a straight line

• It causes the ball to curve ahead of the floor

• It causes the ball to speed up

• It causes the ball to slow down