Question

In an oblique projectile motion of a body which of the following remains constant ?
1. Kinetic energy 2. Speed
3. Horizontal component of velocity
4. Vertical component of velocity ​

Answer 1

In an oblique projectile motion of a body, the horizontal component of velocity remains constant. hence option (3) is correct.

In an oblique projectile motion of a body, Which of the following remains constant ?

1. Kinetic energy
2. Speed
3. Horizontal component of velocity.
4. Vertical component of velocity.

Concepts :

• In projectile motion, the acceleration due to gravity acting vertical downwards on the body and it remains constant.
• In vertical direction, velocity varies with time as v = usinФ - gt, that's why the vertical component of velocity doesn't remain constant.
• In the horizontal direction of body , velocity always remains constant because there is no acceleration acting on the body along horizontal direction.
• Kinetic energy depends on the speed of body . as the speed of body along the projectile motion varies with time. hence, kinetic energy can't be constant.

Therefore the horizontal component of velocity remains constant in an oblique projectile motion of a body.

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