final exam review physics 25

Which of the following is an example of projectile motion?

• A ball being thrown

• A car driving on a straight road

• A book resting on a table

• A person standing still

How does a projectile move in the vertical direction?

• It accelerates downward due to gravity

• It moves at a constant speed

• It accelerates upward

• It remains stationary

How does a projectile move in the horizontal direction?

• It moves at a constant velocity

• It accelerates downward

• It moves in a circular path

• It stops immediately

What is the acceleration of a projectile in both directions?

• Vertical: 9.8 m/s² downward, Horizontal: 0 m/s²

• Vertical: 0 m/s², Horizontal: 9.8 m/s²

• Vertical: 9.8 m/s² upward, Horizontal: 9.8 m/s²

• Vertical: 0 m/s², Horizontal: 0 m/s²

What is the net force of a projectile in both directions?

• Vertical: gravity acts downward, Horizontal: no net force

• Vertical: no net force, Horizontal: gravity acts sideways

• Vertical: gravity acts upward, Horizontal: friction acts forward

• Vertical: friction acts downward, Horizontal: gravity acts forward

How do you calculate the height a projectile is launched from?

• By using the initial vertical velocity and time of flight

• By measuring the horizontal distance only

• By using the mass of the projectile

• By ignoring the effects of gravity

How do you calculate how far a projectile will travel horizontally?

• By multiplying the horizontal velocity by the time of flight

• By dividing the vertical velocity by the mass

• By adding the vertical and horizontal velocities

• By multiplying the mass by gravity

How does mass influence how a projectile falls?

• Mass does not affect the rate at which a projectile falls (ignoring air resistance)

• Heavier objects fall faster than lighter ones

• Lighter objects fall faster than heavier ones

• Mass determines the horizontal distance only

How does surface area influence projectile motion?

• Greater surface area increases air resistance, slowing the projectile

• Greater surface area decreases air resistance

• Surface area has no effect on projectile motion

• Surface area only affects the color of the projectile

A ball is launched horizontally from the top of a cliff with an initial velocity of 20 m/s. The ball in the diagram above strikes the ground after 4 seconds. How high was the cliff the ball was thrown from?

• 78.4 meters

• 40 meters

• 19.6 meters

• 9.8 meters