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Find the incorrect statement
  • a)
    when a body moves with constant speed its acceleration is zero
  • b)
    the body is said to be accelerating if it moves in a uniform circular motion
  • c)
    the slope of velocity – time graph gives instantaneous acceleration
  • d)
    none of these.
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Find the incorrect statementa)when a body moves with constant speed it...
If a body with constant speed is travelling in the same direction(i.e. it is not changing its direction) then its velocity is constant and so its acceleration will be zero. But if the object is changing its direction then its velocity is also changing and so it possesses the acceleration .

Perfect Example

If a body moves in a circular path covering equal distance in equal instances(time interval), it will have a constant speed but it changes the direction continuously. So there is change in velocity as velocity is a vector.

Acceleration is the rate of change of velocity and as velocity doesn't remain constant there is acceleration present in the motion.

In a circular motion, if the magnitude of the velocity remains constant then the acceleration is given by v2/r and is directed towards the centre of the circular path.


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Most Upvoted Answer
Find the incorrect statementa)when a body moves with constant speed it...
Incorrect Statement Explanation:
Acceleration is the rate of change of velocity of an object. When a body moves with a constant speed, it means its velocity is not changing. Therefore, the rate of change of velocity, which is acceleration, is zero. This is because acceleration is defined as the change in velocity over time. If there is no change in velocity, there is no acceleration.

Corrected Statements:
- When a body moves with constant speed, its acceleration is zero.
- The body is said to be accelerating if it moves in a uniform circular motion.
- The slope of a velocity-time graph gives instantaneous acceleration.
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Find the incorrect statementa)when a body moves with constant speed its acceleration is zerob)the body is said to be accelerating if it moves in a uniform circular motionc)the slope of velocity – time graph gives instantaneous accelerationd)none of these.Correct answer is option 'A'. Can you explain this answer?
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