Question

tell me the answers.​

Answer 1

1. when their is a change in its velocity
2. when they r at same speed
3. ys if body is a rest and moving in a constant speed

Answer 2

Answer:

1. In science, motion is defined as the change in position for a particular time interval. An object is considered in motion when its position changes with respect to a point of reference, when its distance changes with respect to a point of reference or when its direction changes with respect to a point of reference.

2.When an object travels in straight line distance and displacement are equal.

3.Yes it can be zero.

For example when object move 10 m and returns to its starting point.

So distance is 20 m and displacement is 0 m.

4. A car goes 10 m in 10 seconds and returns to its initial position in 5 sec.

Average speed=10+10/10+5

= 20/15 = 1.333 m/s

Average velocity=displacement/time

=0/15

=0 m/s

5. Velocity determines the direction of motion.

6.◆In the case of uniform acceleration , both the magnitude and direction of an object doesn't change with respect to time.

◆In the case of non uniform acceleration either magnitude or direction or both of an object changes with respect to time.

◆Uniform acceleration is the change of equal velocity in equal interval of time.

◆Non uniform acceleration is the change of unequal velocity in equal interval of time.

7.The acceleration which is gained by an object because of gravitational force is called its acceleration due to gravity. Its SI unit is m/s2

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