Physics

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

The same amount of time then if it was just dropped

An object is shot from the ground (at 25 m/s) at 25° and 65°. Which is in the air for longer? (assume no air resistance)

65°

An object is shot from the ground (at 25 m/s) at 25° and 65°. Which one rises to a higher height? (Assume no air resistance)

65°

A projectile is launched at 15°, what other angle will produce the same range?

75°

A projectile is launched at 15 m/s of a 20 m high cliff. What is its final acceleration?

9.8 m/s per second downward

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

9.8 m/s squared

What is the vertical acceleration of a projectile?

9.8 m/s squared

Which angle will produce the greatest height (in the absence of air resistance)?

90°

If a bullet is horizontally shot at the same moment another bullet is dropped from the same height, which will hit the ground first?

Hit at the same time

Which of the following statements are true of the horizontal motion of projectiles?

Horizontal velocity is unaffected by the vertical velocity

Roll a bowling ball off the edge of a table. As it falls, it's vertical velocity...

Increases

At what point is the horizontal component of the velocity of a projectile the smallest?

It is the same throughout the path

A football is kicked out of angle of 45°. At the top of the balls path, it's acceleration is:

Pointing downward (vertical)

Roll a bowling ball off the edge of a table. As it falls, it's horizontal component of velocity...

Remains constant

An object is shot from the ground (at 25 m/s) at 25° and 65°. Which one has the greater range? (assume no air resistance)

Same for both

If a bullet is horizontally shot at the same moment another bullet is dropped from the same height, which has a larger verticals be when they hit the ground?

Same for both

Which of the following are true of the time of flight for projectiles launched at a angle?

-it depends on the acceleration of gravity -it is changed by increasing launching velocity -it depends on the vertical component of initial velocity

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

0 m/s

What is the horizontal acceleration of a projectile?

0 m/s^2

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

12 m/s

A projectile is launched at 15 m/s of a 20 m high Cliff. What is its X position after one second

15 m

A projectile is launched at 15 m/s of a 20 m high cliff. What is its final Vx?

15 m/s

If you drop a banana, how fast is it going after two seconds?

19.6 m/s

Two projectiles are fired at 30° and 60°. Which hits the ground first?

30°

Which angle will produce the greatest range (in the absence of a resistance)?

45°

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

False

A football is kicked at angle of 45°. At the very top of the balls path, its velocity is:

Entirely horizontal

If two projectiles are launched at different angles that have the same Peak height, which is true?

They have the same hangtime