Please solve the question in the attachment......................
Please solve the question in the attachment......................
Pawan joshi , 7 Years ago
Grade 12th pass
Mechanics> Please solve the question in the attachme...
3 AnswersSARTHAK TOMAR
The answer will be d bcoz first the acceleration is negative hence velocity decrease but does not become zero and after that the vice versa. Hope u get the answr
SARTHAK TOMAR
The answer will be A because first the displacement is decreasing and therefore velocity should be negative and should increase upto t=1 but suddenly after t=1 the displacement starts to increase. Therefore we can say graph mentioned in (a) will be correct
Pratik Kumawat
Hey Pawan joshi,
lets move towards the solution
In the first curve displacement(s) is decreasing with increase in time .
and you can see the curve is like a parabola in only first quadrant having eqn t2= -4as (refer notes of parabola).
differentiating it , we will get ds/dt = -(1/4a)*2t , where ds/dt is velocity.
and it is negative and linearly dependent on time .
for curve between t=1 and t=2 ,
the slope of curve is decreasing linearly and it is always positive .
so Option A is correct.
Pratik Kumawat
IIT(ISM) Dhanbad
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