Answer:
Explanation:
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Because "velocity" means the speed and direction of the motion.
In circular motion, or motion on any curved path, the direction is constantly changing. So even if the speed isn't changing, the <em>velocity</em> is.
Answer:
So option (a) is correct option
Explanation:
We have given final speed of the car = 23 m/sec
And initial speed of the car = 30 m/sec
Time in which speed is decreases t = 2 sec
From first equation of motion we know that v = u+at
So acceleration
Negative sign indicate that acceleration will be in opposite direction
So
So option (a) is correct option
Every body continues in a state of rest or uniform motion in a straight line unless acted on by a resultant external force. That's approximately Newton's first law of motion.
So, the velocity of something tends to remain the same, unless an external force changes it. This is sometimes called "inertia". A body at rest, as in with "no velocity" will tend to remain at rest, unless there's a force on it. inertia again.
Answer:
2.62 m
Explanation:
Let the small child sit at a distance x from the pivot.
The distance of big child from the pivot is 4 - x .
By using the concept of moments.
Clockwise moments = anticlockwise moments
27 x = 51 ( 4 - x )
27 x = 204 - 51 x
78 x = 204
x = 2.62 m