Question 1

Vertical acceleration is always equal to

Accepted Answer

9.8 m/s2

Answer

initial vertical velocity

Answer

0 m/s2

Answer

initial velocity

Question 2

Horizontal acceleration is always equal to

Accepted Answer

0 m/s2

Answer

initial horizontal velocity

Answer

9.8 m/s2

Answer

initial velocity

Question 3

When is the vertical velocity of a projectile the smallest?

Accepted Answer

at the maximum height

Answer

right after it leaves the ground

Answer

right before it hits the ground

Question 4

The initial horizontal velocity of a projectile is 12.5 m/s.  What is the horizontal velocity just before the projectile hits the ground?

Accepted Answer

12.5 m/s

Answer

25 m/s

Answer

50 m/s

Answer

0 m/s

Question 5

A baseball is thrown with an initial velocity of 14 m/s  and is in the air for 2 seconds.  Which of the following is constant while the baseball is in the air?

Accepted Answer

acceleration

Answer

position

Answer

velocity

Answer

displacement

Question 6

A rock is kicked horizontally off of a bridge with an initial velocity of 20 m/s and is in the air for 2 seconds.  What is the horizontal velocity of the ball just before it strikes the ground?

Accepted Answer

20 m/s

Answer

10 m/s

Answer

40 m/s

Answer

0 m/s

Question 7

A rock is thrown  at  horizontally 7 m/s and it remains in the air for 4 seconds.  Which equation do you use to find the horizonal displacement?

Accepted Answer

x = Vx times t

Answer

Vfy = Viy + at

Answer

y = 0.5gt²

Question 8

A rock is thrown horizontally  at 15 m/s and is in the air for 3.5 seconds.  Which equation do you use to find horizontal displacement?

Accepted Answer

x = Vx times t

Answer

y = 0.5gt²

Question 9

Angie walks 5 miles east, then turns and walks 2 miles west.  What is her distance walked?

Accepted Answer

7 miles

Answer

3 miles

Answer

10 miles

Answer

2.5 miles

Question 10

Angie walks 5 miles east, then turns and walks 2 miles west.  What is her displacement?

Accepted Answer

3 miles

Answer

5.4 miles

Answer

29 miles

Answer

7 miles

Question 11

Rock A is thrown horizontally off of a cliff with a velocity of 20 m/s. The rock lands 60 m from the base of the cliff. A second rock (Rock B) is dropped from the same height from which Rock A was thrown. If both rocks are released simultaneously, which rock will strike the ground first?

Accepted Answer

They will strike the ground at the same time.

Answer

Rock B

Answer

Rock A

Question 12

A marble is kicked horizontally off of a 35.75 m high roof at 10 m/s . Which equation do you use to figure out the time?

Accepted Answer

y = .5gt2

Answer

x = V_x times t

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