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3. What is meant by uniform speed? How does variable speed differ from the uniform speed?4. Define the term velocity. Is velocity a scalar or a vector quantity? What are the SI units of velocity?5. When is the velocity said to have changed?6. What is meant by average velocity of a body moving in a particular direction?7. How does speed differ from velocity? |
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Answer» Explanation: 3) Uniform Speed: A body is said to be MOVING with uniform speed, if it covers equal distances in equal INTERVALS of TIME, however small these intervals may be. Variable Speed: A body is said to be moving with variable speed if it covers unequal distances in equal intervals of time, however small these intervals may be. the variable speed differ with uniform speed by the coverage of distance... 4) Velocity is defined as the displacement per unit time in a particular direction velocity is a vector quantity and its SI units are meter/sec..
5) change in speed, or a change in direction, or a change in both speed and direction means that the object has a change in velocity... 6) AVERAGE velocity=linear displacement /total time 7) velocity is the speed with a direction, while speed does not have a direction. Speed is a scalar quantity |
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