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Question (11)
QN0034886

The coordinates of a particle moving in  plane at any instant of time  are . The speed of the particle at that instant is

  • (A)

  • (B)

  • (C)

  • (D)

Correct Answer: A
Explanation:

According to the question, at any instant ,

and

The speed of the particle at instant .

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Question (12)
QN0034887

The shape of trajectory of the motion of an object is determined by

  • (A)

    acceleration

  • (B)

    initial position

  • (C)

    initial velocity

  • (D)

    All of these

Correct Answer: D
Explanation:

The equation of motion for projectile is

The shape of the trajectory depends on the initial position, initial velocity and acceleration.

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