REVIEW- Physics Final

What causes an object to move in the y-direction when it is in projectile motion?

• initial velocity
• air resistance
• gravity
• magnetic force

What is the acceleration in the x-direction for a projectile motion?

• 0 m/s^2
• 9.8 m/s^2
• constant but not zero
• depends on the angle of the projection

What shape does the trajectory of a projectile take?

• linear
• parabolic
• circular
• elliptical

At the highest point of its trajectory, what is the vertical velocity of a projectile?

• unchanged
• zero
• minimum
• maximum

If a ball is thrown horizontally from a cliff, how does its speed in the x-direction change?

• varies randomly
• remains constant
• decreases over time
• increases over time

If two objects are dropped from the same height, one thrown horizontally and the other dropped straight down, which hits the ground first?

• the thrown object
• the dropped object
• both at the same time
• cannot be determined

What happens to the velocity in the y-direction if a projectile is thrown upwards?

• it remains constant
• it decreases until the projectile stops ascending
• it increases due to gravity
• it is zero throughout

What is the effect of gravity on the acceleration of a projectile in the y-direction?

• makes it zero
• increases it by 9.8 m/s^2
• decreases it by 9.8 m/s^2
• no effect

How does the horizontal motion of a projectile affect its vertical motion?

• it speeds up the vertical motion
• it slows down the vertical motion
• it has no effect on the vertical motion
• it reverses the vertical motion

In projectile motion, what is true about the time of ascent to the highest point compared to the time of descent back to the same level?

• depends on the initial velocity
• time of ascent is longer
• both times are equal
• time of descent is longer