Question

Q9) Define speed and velocity. Write their S.I units. A body is moving with a velocity of
15 m s. If the motion is uniform what will be the velocity after 10s?​

Answer 1

Answer:

Define speed and velocity. Write their S.I units

Ans : Speed and velocity are both measured using the same units. The SI unit of distance and displacement is the meter. The SI unit of time is the second. The SI unit of speed and velocity is the ratio of two — the meter per second.

Explanation:

A body is moving with a velocity of 15 m s. If the motion is uniform what will be the velocity after 10s?​

Ans: Uniform motion implies no acceleration which means no change in velocity.  So, velocity will still be 15m/s after 10 seconds.

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Answer 2

Speed = the rate of motion of an object is to find out the distance travelled by the object in unit time. this quantity is referred to as speed.

SI unit of speed is metre per second or m/s .

Velocity = velocity is the speed of an object moving in a definite direction.

SI unit of velocity is metre per second or m/s .

* the SI unit of speed and velocity have the same unit that is metre per second or m/s.

When a body moves with uniform velocity it means that it covers equal distance in equal intervals of time. So the velocity after ten seconds will remain the same that is 15 meters per second.

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