For a horizontal launch (θ0 = 0) at a fixed height ℎi > 0, are the statements below correct? (Assuming friction can be ignored.)

(1) The object is moving along a straight line.
(2) The acceleration in the horizontal direction is zero.
(3) No matter how fast the object is launched, the travel time is always the same.
(4) No matter how fast the object is launched, the horizontal travel distance Δx is always the same.

1) False. 2) True. 3) True. 4) False.

Step-by-step explanation:

1) False. The force of gravity will drive it down. The path will form a parabola.

2) True. There is no variation in the velocity in the horizontal axis and no force applied so the acceleration is zero.

3) True. The travel time depends on the height and the acceleration of gravity, and independent of the velocity of the rocket at launch.

4) False. The travel distance depends on the initial velocity of the rocket (at launch).

0 is its x and y coordinate

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