Question

7. Mention any two causes of variation in the velocity
of a particle.
9. Define instantaneous
velocity

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Answer 1

Answer:

either a force impulse can cause variation in the velocity of a particle..

Answer 2

Answer:

1. Velocity of a particle changes.

(1) If magnitude of velocity changes.

(2) If direction of motion changes.

2. The physical velocity of a body in a point, or instantaneous velocity, is the velocity the body has at a specific time in a particular point of its trajectory. Instantaneous velocity, or simply velocity, is defined as the limit of the average velocity when the time change approaches zero.

Explanation:

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