2-Dimensional Motion

Multiple Choice

Which of the following best describes 2-dimensional motion?

• Motion that occurs only in a straight line

• Motion that requires both horizontal and vertical components

• Motion that is only affected by friction

• Motion that occurs only in a circular path

Multiple Choice

In a horizontal launch, what is the value of the initial vertical velocity (Viy)?

• 0

• Vi

• g

• -g

Multiple Select

Select all correct statements about the motion of a projectile launched non-horizontally.

• The maximum height is reached when the vertical velocity is zero.

• The horizontal acceleration is zero.

• The vertical acceleration is equal to -g.

• The horizontal velocity increases during flight.

Fill in the Blanks

Fill in the blank: In a non-horizontal launch, the initial vertical velocity is given by Viy = Vi

θ.

Multiple Choice

Which of the following correctly represents the initial vertical and horizontal velocity components for a projectile launched at 25 m/s at an angle of 35°?

• v_iy = 25sin(35°), v_ix = 25cos(35°)

• v_iy = 25cos(35°), v_ix = 25sin(35°)

• v_iy = 25tan(35°), v_ix = 25cot(35°)

• v_iy = 25, v_ix = 35

Multiple Select

Which of the following quantities remain constant throughout the projectile's flight?

• Horizontal velocity

• Vertical velocity

• Vertical acceleration

• Horizontal acceleration

Multiple Select

Which of the following quantities are needed to calculate the period of revolution for an object in uniform circular motion?

• Radius of the circle

• Mass of the object

• Speed of the object

• Acceleration of the object

Multiple Choice

Which formula represents the acceleration of an object in uniform circular motion?

• a = v^2 / r

• a = r / v^2

• a = v / r^2

• a = r^2 / v

Multiple Choice

What is the most common example of an object moving in two dimensions?

• A car driving on a straight road

• A projectile

• A spinning top

• A stationary object