Projectile Motion

A projectile is launched horizontally and hits the ground below. The vertical displacement and the horizontal displacement are measured. What is the best equation to use to find the time the projectile was in the air?

•  $v_x=\frac{\Delta x}{t}$ 

•  $\Delta y=-\frac{1}{2}\cdot g\cdot t^2$ 

•  $v_y=v_i-g\cdot t$ 

• Cannot be determined

In the diagram, which letter represents the vertical displacement  $\Delta y$  ?

• A

• B

• C

• D

In the diagram, which letter represents the horizontal displacement $\Delta x$ ?

• A

• B

• C

• D

The more mass an object has, the faster it will fall.

• True
• False

If you throw a baseball straight up, what is its velocity at the highest point?

• 10 m/s²

• 10 m/s

• 0 m/s²

• 0 m/s

If you throw a baseball straight up, what is its acceleration at the highest point?

• 10 m/s²

• 10 m/s

• 0 m/s²

• 0 m/s

What is the horizontal acceleration of a projectile?

• 0 m/s²

• 10 m/s²

• 10 m/s

• 0 m/s

What is the vertical acceleration of a projectile?

• 0 m/s²

• 10 m/s²

• 10 m/s

• 0 m/s

If I throw a crayon straight up at 12m/s, how fast is its speed when i catch it at the same height?

• 6 m/s
• 12 m/s
• 18 m/s
• 24 m/s

Two objects are shot from the ground at 25 m/s at 25 degrees and 65 degrees. Which one rises to a higher height?

• 25 degrees

• 65 degrees

• same for both

• Cannot be determined