Physics - 2D

What is the horizontal acceleration of a projectile?

• 0 m/s²

• 9.8 m/s²

• -9.8 m/s²

• 4.9 m/s²

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

• 9.8 m/s²

• 9.8 m/s

• 0 m/s²

• 0 m/s

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

• 9.8 m/s²

• 9.8 m/s

• 0 m/s²

• 0 m/s

An object is projected horizontally from a cliff. The time it takes to hit the ground is

• more than if it was just dropped

• less than if it was just dropped

• the same amount of time than if it was just dropped

• impossible to determine

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

At what point is v_y= 0 m/s?

• A

• B

• C

• D

• None of these points

At what point is v_x= 0 m/s?

• A

• B

• C

• D

• None of these points

A projectile is launched at 68.0° above the horizontal and at a speed of 55 m/s. What is the maximum height reached by the projectile?

• 233 m

• 158 m

• 2.6 m

• 133 m

speed of an object in a particular direction

• motion

• velocity

• speed

• acceleration

What does this graph represent?

• Constant speed
• Acceleration
• Not moving