Projectile Motion

Multiple Choice

In the diagram, which letter represents the vertical displacement $$\overrightarrow{d}_y$$  ?

• A

• B

• C

• D

Multiple Choice

In the diagram, which letter represents the horizontal displacement $$\overrightarrow{d}_x$$ ?

• A

• B

• C

• D

Multiple Choice

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

• True
• False

Multiple Choice

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

• about 10 m/s²

• about 10 m/s

• 0 m/s²

• 0 m/s

Multiple Choice

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

• about 10 m/s²

• about 10 m/s

• 0 m/s²

• 0 m/s

Multiple Choice

A ball rolls off a table and strikes the floor, as shown. If the time the ball spent in the air was 0.58 s, how fast did the ball leave the table?

• 3.6 m/s

• 1.2 m/s

• 2.9 m/s

• 0.99 m/s

Multiple Choice

A frog jumps vertically straight up. Which of the following is true?

• gravity gives the frog a vertical speed of -10 m/s

• gravity gives the frog a vertical acceleration of -10 m/s²

• the frog has a horizontal speed of -10 m/s

• the frog has a horizontal acceleration of -10 m/s²

Multiple Choice

Which of the following would NOT be considered a projectile?

• a cannonball thrown straight up

• a cannon ball rolling down a hill

• a cannonball rolling off a table

• a cannonball thrown into the air

Multiple Choice

Suppose Lemming A runs off the edge of the cliff at 2 m/s and Lemming B runs off the edge at 1 m/s. Which will hit the ground first?

• A

• B

• Both at the same time

Multiple Choice

An object is thrown 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

Multiple Choice

A projectile is launched with a horizontal speed of 54 m/s. Ignoring air resistance, after 2 seconds it's horizontal speed is...

• 34 m/s

• 54 m/s

Multiple Choice

A ball is thrown horizontally at a height of 2.2 meters at a velocity of 65 m/s. Assume no air resistance. How long until the ball reaches the ground?

• 0.45 s
• 0.67 s
• 0.22 s
• 0.47 s