A projectile is launched from the roof of a building. Which of the following statements is true for its motion (ignore air resistance)?Group of answer choicesIts horizontal velocity is constant but the vertical velocity changes with timeBoth its horizontal and vertical velocities are constantBoth its horizontal and vertical velocities are changing with timeIts horizontal velocity changes with time but the vertical velocity remains constant.Correct answer is not in the list
Question
A projectile is launched from the roof of a building. Which of the following statements is true for its motion (ignore air resistance)?Group of answer choicesIts horizontal velocity is constant but the vertical velocity changes with timeBoth its horizontal and vertical velocities are constantBoth its horizontal and vertical velocities are changing with timeIts horizontal velocity changes with time but the vertical velocity remains constant.Correct answer is not in the list
Solution
The correct answer is: Its horizontal velocity is constant but the vertical velocity changes with time.
Here's why:
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Horizontal Velocity: In the absence of air resistance, the only force acting on a projectile is gravity, which pulls it downwards. This means that there is no force acting horizontally to change its horizontal velocity. Therefore, the horizontal velocity of a projectile remains constant throughout its flight.
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Vertical Velocity: The force of gravity is constantly pulling the projectile downwards, which causes the vertical velocity to change over time. When the projectile is launched, it has a certain upward velocity. As it rises and reaches its peak, the vertical velocity becomes zero. Then, as it falls back down, the vertical velocity increases in the downward direction. Therefore, the vertical velocity of a projectile changes with time.
Similar Questions
In projectile motion the horizontal component of velocity: a. Remains constant b. Decreases with time c. Changes uniformly d. Increases with time
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A projectile launched from a roof top of a building lands on the horizontal level ground. The distance where it lands on the ground from the buildingGroup of answer choicesdepends on the intial velocity and the height of the buildingOnly depends on the initial velocityOnly depends on the height of the buildingDoes not depend on initial velocity or the height of the buildingCorrect answer is not in the list
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