What happens to velocity when direction changes?
A change in direction affects velocity since velocity is a vector. Even if the speed remains constant, a change in direction means a change in velocity.
How does velocity differ in projectile motion?
In projectile motion, velocity has both horizontal and vertical components, and the magnitude and direction of the velocity change over time due to gravity.
What is instantaneous velocity?
Instantaneous velocity is the velocity of an object at a specific moment in time.
How does acceleration affect velocity?
Acceleration is the rate of change of velocity. If acceleration is positive, the velocity increases, and if acceleration is negative (deceleration), the velocity decreases.
What is average velocity?
Average velocity is the total displacement divided by the total time taken. It gives the overall rate of change of position over a time interval.
What is the SI unit of velocity?
The SI unit of velocity is meters per second (m/s).
Can velocity be negative?
Yes, velocity can be negative if the object is moving in the opposite direction relative to a chosen reference point.
What is the difference between speed and velocity?
Speed is a scalar quantity that refers to how fast an object is moving, while velocity is a vector quantity that includes both speed and direction.
What is the principle behind periscopes using mirrors?
Periscopes use a system of plane mirrors set at precise angles that allow light to enter from one end, reflect twice, and exit from the other end, enabling views over obstacles or from hidden positions.
Can concave mirrors also create virtual images?
Yes, when the object is placed between the focal point and the mirror, concave mirrors produce virtual, erect, and magnified images.
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