Horizontal Projectiles 1

Which best describes the horizontal motion of a projectile, assuming no air resistance?

• Acceleration of -10 m/s²

• Acceleration of -5 m/s²

• An increasing acceleration every second

• Constant velocity

Which best describes the vertical motion of a projectile, assuming no air resistance?

• Acceleration of -10 m/s²

• Accelerations of -5 m/s²

• An increasing acceleration every second

• Constant velocity

A marble traveling at 3 m/s rolls off the edge of a 1 m high table. What is its initial vertical speed?

• -10 m/s

• 0 m/s

• -3 m/s

• -15 m/s

What is the relationship between motion in the x and y-dimensions?

• If x is greater, then y is greater

• If x is greater, then y is less

• There is no relationship; independent

What is the effect of gravity on the vertical motion of a projectile?

• It causes the projectile to decelerate upwards

• It has no effect on the vertical motion

• It causes the projectile to accelerate downwards at a constant rate

• It causes the projectile to move upwards at a constant speed

What happens to the vertical velocity of a projectile at its peak height?

• It is at its maximum value

• It is zero

• It is equal to the horizontal velocity

• It is negative

Ryan is running at a horizontal speed of 1.23 m/s.

While running, Ryan throws a  football straight up into the air with an initial speed of 30 m/s.

It is caught at the same distance above the ground that it was thrown from.

• 30 m/s

• Horizontal a

• 1.23 m/s

• Vertical V_f

• Unknown

• Horizontal T

  =
  Vertical T

• 0 m/s²

• Horizontal V₀

  =

  Horizontal V_f

• 0 m/s

• Vertical V₀