Physics
Figure shows the graphical variation of displacement with time for the case of a particle moving along a straight line. The accelerations of the particle during the intervals and are respectively
PhysicsGeneral
 0 + 0
 + 0 + +

 0 0
Answer:The correct answer is: The portion of the graphs is convex upward. It represents negative acceleration. The portion represents negative acceleration. The portion represents that is not changing with time. Clearly, it is a case of zero acceleration. The portion of the graph is concave upward. It represents positive acceleration. The portion is a straight line sloping upward to the right. It represents uniform velocity and hence acceleration is zero
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The displacementtime graph of a moving particle is shown below. The instantaneous velocity of the particle is negative at the point
Slope is negative at the point .
The displacementtime graph of a moving particle is shown below. The instantaneous velocity of the particle is negative at the point
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A ball is thrown vertically upwards. Which of the following plots represents the speedtime graph of the ball during its flight if the air resistance is not ignored
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Effective acceleration
And for downward motion
Effective acceleration
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And for downward motion
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physicsGeneral
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And for downward motion
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A stone dropped from a building of height and it reaches after seconds on earth. From the same building if two stones are thrown (one upwards and other downwards) with the same velocity and they reach the earth surface after and seconds respectively, then
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(v)
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Or
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if a stone is thrown upward with velocity then
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If a stone is thrown downward with velocity then
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Or
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A stone dropped from a building of height and it reaches after seconds on earth. From the same building if two stones are thrown (one upwards and other downwards) with the same velocity and they reach the earth surface after and seconds respectively, then
physicsGeneral
If a stone is dropped from height then
(i)
if a stone is thrown upward with velocity then
(ii)
If a stone is thrown downward with velocity then
(iii)
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(v)
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Or
By solving
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if a stone is thrown upward with velocity then
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Maximum acceleration will be represented by part of the graph
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physicsGeneral
Maximum acceleration will be represented by part of the graph
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(paraboli(c)
and after the collision, (straight line)
Collision is perfectly elastic then ball reaches to same height again and again with same velocity
and after the collision, (straight line)
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m.
m.
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m.
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