Projectile Motion Quiz

A ball is rolled off a table with an initial horizontal speed of 5 m/s. Neglecting air resistance, the time it takes to hit the ground depends on:

• The horizontal speed

• The height of the table

• Both the horizontal speed and height

• Neither the horizontal speed nor the height

If two objects are dropped from the same height, one being dropped vertically and the other given a horizontal velocity, they will:

• Hit the ground at the same time

• Hit the ground at different times

• Depend on their masses

• Depend on their horizontal velocities

The horizontal velocity of a projectile remains constant because:

• Gravity does not act in the horizontal direction

• There is no air resistance

• Gravity cancels horizontal forces

• Both A and B

For a ball rolling off a table, its horizontal displacement depends on:

• Initial horizontal velocity and height

• Initial vertical velocity

• Height only

• Mass of the ball

A projectile launched horizontally will experience:

• Constant acceleration downward

• Constant speed in both directions

• Increasing speed in the horizontal direction

• No acceleration

If the height of a table is doubled while keeping the horizontal speed constant, the time of flight:

• Increases

• Decreases

• Stays the same

• Depends on the mass

A marble is launched horizontally at 10 m/s. Ignoring air resistance, what is its vertical acceleration during its flight?

• 0 m/s²

• -10 m/s²

• -9.8 m/s²

• Depends on the mass

The range of a projectile launched horizontally from a certain height depends on:

• Horizontal velocity and height

• Vertical velocity

• Mass of the object

• Height only

At the peak of its trajectory, the vertical velocity of a horizontally launched projectile is:

• Zero

• Maximum

• Equal to its initial velocity

• Does not exist for horizontal motion

Two balls are launched horizontally from the same height but with different speeds. Which hits the ground first?

• The faster ball

• The slower ball

• They hit the ground at the same time

• Depends on their masses