2D Motion Bell Ringer 1

An object is thrown horizontally from the top of a building. Which of the following statements about its motion is correct (ignoring air resistance)?

• The vertical motion affects the horizontal motion.

• The horizontal velocity increases as the object falls.

• The object's speed remains constant throughout its flight.

• The time it takes to hit the ground depends only on the height of the building.

A student drops a ball from a window while a second student throws an identical ball horizontally from the same window at the same time. Which ball hits the ground first (ignoring air resistance)?

• The ball that was dropped.

• The ball that was thrown horizontally.

• The ball with the greater mass.

• They both hit the ground at the same time.

A ball is launched from a catapult. What is the direction of the acceleration of the ball at the highest point of its trajectory?

• Forward, in the horizontal direction.

• There is no acceleration at the highest point.

• Upward, in the vertical direction.

• Downward, towards the ground.

A skateboarder rolls off a ramp at a constant horizontal speed. What happens to the vertical velocity of the skateboarder after they leave the ramp?

• It remains constant because the horizontal speed is constant.

• It becomes zero and stays zero.

• It increases in the downward direction.

• It decreases in the downward direction.

A marble rolls off a horizontal table and lands on the floor. Which of the following would cause the marble to land a greater horizontal distance from the table?

• Increasing the height of the table.

• Increasing the mass of the marble.

• Decreasing the initial speed of the marble.

• Increasing the initial horizontal speed of the marble.