Home
Class 11
PHYSICS
A situation is shown in which two object...

A situation is shown in which two objects A and B start their motion from same point in same direction. The graph of their velocities against time is drawn. `u_A and u_B` are the initial velocities of A and B respectively. T is the time at which their velocities become equal after start of motion. You cannot use the data of one question while solving another question of the same set. So all the questions are independent of each other.
5. If the value of T is 4 s, then the time after which A will meet B is

A

12 s

B

6 s

C

8 s

D

data insufficient

Text Solution

Verified by Experts

The correct Answer is:
C
`u_A=a_AT=u_B-a_BT`
Putting `T=4s`
we get `4(a_A+a_B)=u_B-u_A…..(i)`
Now, `S_A=S_B`
`:. u_At+1/2a_At^2=u_Bt-1/2a_Bt^2`
`:. t=2(u_B-u_A)/(a_A+a_B)=2xx4=8s`
Promotional Banner

Topper's Solved these Questions

  • KINEMATICS

    DC PANDEY ENGLISH|Exercise Subjective Questions|24 Videos

  • KINEMATICS

    DC PANDEY ENGLISH|Exercise SCQ_TYPE|39 Videos

  • KINEMATICS

    DC PANDEY ENGLISH|Exercise More Than One Correct|6 Videos

  • GRAVITATION

    DC PANDEY ENGLISH|Exercise (C) Chapter Exercises|45 Videos

  • KINEMATICS 1

    DC PANDEY ENGLISH|Exercise INTEGER_TYPE|15 Videos

Similar Questions

Explore conceptually related problems

A situation is shown in which two objects A and B start their motion from same point in same direction. The graph of their velocities against time is drawn. u_A and u_B are the initial velocities of A and B respectively. T is the time at which their velocities become equal after start of motion. You cannot use the data of one question while solving another question of the same set. So all the questions are independent of each other. 7. After 10 s of the start of motion of both objects A and B, find the value of velocity of A if u_A = 6 ms^-1 , u_B = 12 ms^-1 and at T velocity of A is 8 ms^-1 and T = 4s

A situation is shown in which two objects A and B start their motion from same point in same direction. The graph of their velocities against time is drawn. u_A and u_B are the initial velocities of A and B respectively. T is the time at which their velocities become equal after start of motion. You cannot use the data of one question while solving another question of the same set. So all the questions are independent of each other. 6. Let v_A and v_B be the velocities of the particles A and B respectively at the moment A and B meet after start of the motion. If u_A = 5 ms^-1 and u_B = 15 ms^-1, then the magnitude of the difference of velocities v_A and v_B is

Two particles A and B are projected from the same point in different direction in such a manner that their velocity vectors are shown in the diagram :- .

Two cars A and B start moving from the same point with same velocity v=5km/minute. Car A moves towards North and car B in moving towards East. What is the relative velocity of B with respect to A ?

As per the shown figure the central solid cylinder starts with initial angular velocity omega_(0) Find the time after which the angular velocity becomes half.

A projectile is projected at an angle alpha with an initial velocity u. The time t, at which its horizontal velocity will equal the vertical velocity for the first time

The slope of velocity-time graph for uniform motion of an object is

A particle starts its motion from the origin in positive x-direction. The given graph shows the variation of acceleration (a) with velocity (v). Plot the corresponding graph between velocity and time.

The acceleration-time (a-t) graph of a particle moving along straight line is as shown in figure. The time at which velocity of particle becomes equal to its initial velocity is

The velocity time graph of a linear motion is shown in the figure. The distance from the starting point after 8 seconds will be .