Home Physics Newton's Laws of Motion JEE Main 2025 A body of mass 2 kg moving with velocity of …
Physics Newton's Laws of Motion JEE Main 2025 MCQ (Single Correct)

A body of mass 2 kg moving with velocity of enters into a constant force field of 6 N directed along positive -axis. If the body remains in the field for a period of seconds, then velocity of the body when it emerges from force field is.

A
B

C
D

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Text Solution

Verified by Experts
The correct answer is:
D

To determine the velocity of the body as it emerges from the force field, we can break this process down as follows:

Force and Acceleration Calculation:

The body is subjected to a constant force of 6 N, which acts along the positive z -axis. The mass of the body is 2 kg.

Using Newton's second law, , the acceleration can be calculated as:

Initial Velocity:

The initial velocity of the body is given by:

Time of Motion:

The time the body spends in the force field is:

Final Velocity Calculation:
The final velocity is given by the equation of motion:

Substituting the known values:

Simplifying the expression gives:

Therefore, the velocity of the body as it exits the force field is .

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