Question

which constant for a projectile fired from Earth ​

Answer 1

Ques. Q: Which of the following remains constant for a projectile fired from the earth ?

(a)Kinetic energy

(b) Momentum

(c) Horizontal component of velocity

(d) Vertical component of velocity

Answer:

The correct answer is option (c) Horizontal component of velocity.

Explanation:

• The horizontal component of velocity remains constant since there is no horizontal acceleration.
• If we disregard air friction in a projectile motion, the downward-pointing gravity force is the only force that operates.
• Since there is no force acting in the horizontal direction, the horizontal component of velocity stays constant.
• The horizontal velocity remains constant, as there is no acceleration in that direction.
• The length of the horizontal velocity vector does not change. Vertical and horizontal motion are independent.
• Horizontal velocity does not affect vertical speed.

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