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प्रश्न
Read the statement below carefully and state, with reason and example, if it is true or false:
A particle in one-dimensional motion with zero speed at an instant may have non-zero acceleration at that instant
पर्याय
True
False
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उत्तर
This statement is True.
Explanation:
When an object is thrown vertically up in the air, its speed becomes zero at its maximum height. However, it has acceleration equal to the acceleration due to gravity (g) that acts in the downward direction at that point.
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संबंधित प्रश्न
In the following examples of motion, can the body be considered approximately a point object:
A railway carriage moving without jerks between two stations.
A drunkard walking in a narrow lane takes 5 steps forward and 3 steps backward, followed again by 5 steps forward and 3 steps backward, and so on. Each step is 1 m long and requires 1 s. Plot the x-t graph of his motion. Determine graphically and otherwise how long the drunkard takes to fall in a pit 13 m away from the start.
Look at the graph carefully and state, with reason, that this cannot possibly represent the one-dimensional motion of a particle.
Assertion: If distance travelled by a body is not zero, then displacement of a body will be a non-zero.
Reason: Displacement of a body is the shortest distance between initial and final positions.
The numerical ratio of distance to displacement is ______.
An athlete completes one round of a circular track of radius R in 80 sec. What will be his displacement at the end of 4 min 60 seconds?
In the following example of motion, can the body be considered approximately a point object:
A monkey sitting on top of a man cycling smoothly on a circular track.
In the following example of motion, can the body be considered approximately a point object:
A spinning cricket ball that turns sharply on hitting the ground.
In the following example of motion, can the body be considered approximately a point object:
A tumbling beaker that has slipped off the edge of a table.
Look at the graph carefully and state, with reason, that this cannot possibly represent the one-dimensional motion of a particle.
Look at the graph carefully and state, with reason, that this cannot possibly represent the one-dimensional motion of a particle.
Look at the graph carefully and state, with reason, that this cannot possibly represent the one-dimensional motion of a particle.
