Grade 12th passMechanics
Please solve the question in the attachment......................
Please solve the question in the attachment......................
3 Answers
SARTHAK 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
Other Related Questions on mechanics
Three identical balls are placed on a frictionless
horizontal surface touching each other. They stick to
each other because of adhesive. Another ball of same
radius and mass m is placed over the void created by
the three balls. Find the forces applied by the balls
kept on the floor to each other if the system remains
in equilibrium.
Three identical balls are placed on a frictionless
horizontal surface touching each other. They stick to
each other because of adhesive. Another ball of same
radius and mass m is placed over the void created by
the three balls. Find the forces applied by the balls
kept on the floor to each other if the system remains
in equilibrium.
mechanics
Last Activity: 10 Months ago
A car loaded with water having total mass 1000 kg moves on a straight horizontal Road starting from rest under the action of a force of 100 Newton. The water spills throw a small hole in the bottom at a rate of 0.1 KG per second the velocity of cart after 300 seconds is nearly.
11
21
31
41
A car loaded with water having total mass 1000 kg moves on a straight horizontal Road starting from rest under the action of a force of 100 Newton. The water spills throw a small hole in the bottom at a rate of 0.1 KG per second the velocity of cart after 300 seconds is nearly.
11
21
31
41
mechanics
Last Activity: 10 Months ago
A metal strip clamped at one end vibrates with a frequency of 20 Hz and amplitude of 5 mmat the free end, where a small mass of 2 g is positioned. determine(i) The velocity of the end when passing through the zero position(ii) The acceleration at maximum displacement(iii) The maximum kinetic energy of the mass
A metal strip clamped at one end vibrates with a frequency of 20 Hz and amplitude of 5 mm
at the free end, where a small mass of 2 g is positioned. determine
(i) The velocity of the end when passing through the zero position
(ii) The acceleration at maximum displacement
(iii) The maximum kinetic energy of the mass
mechanics
Last Activity: 3 Years ago
If a=x² find the displacement at t =3sec if body velocity at t= 0 sec is 0
If a=x² find the displacement at t =3sec if body velocity at t= 0 sec is 0
mechanics
Last Activity: 3 Years ago