Correct option (A) – (s) ; (B) – (p,q,r,s,t) ; (C) – (p,q,r,s,t) ; (D) – (qr,s,t)
Explanation:
(A) Normal force from ground lies along line of impact. Hence (A) is not answer.
(B) Since no external force act perpendicular to the line of impact. (B) is an answer.
(C) Horizontal direction is same as direction perpendicular to the line of impact. (C) is an answer.
(D) Normal impulse from ground lies in vertical direction. (D) is not an answer
(A) The component of normal force from ground lies along the line of impact. Hence not an answer
(B) No external force perpendicular to the line of impact for A.
(C) For the system A + B there is no external froce along horizontal direction. Hence an answer
(D) For B the normal force from ground is balanced by the impulsive force by A. Initial and final momentum is zero. Hence an answer.
(A) The component of tension force of thread lies along the line of impact. Hence not an answer
(B) No external force perpendicular to the line of impact for A.
(C) For system A + B there is no external froce along horizontal direction. Hence an answer
(D) For B the tension force from thread is balanced by the impulsive force by A. Initial and final momentum is zero. Hence an answer
(A) & (C) are the same direction and there is no external force for the system A + B. Hence answer.
(B) & (D) are the same direction and there is no net force for the system A + B. Hence answer.
(A) The component of normal force from ground lies along the line of impact. Hence not an answer
(B) Is answer because the normal force from the ground is balanced for A. Hence an answer.
(C) For the system A + B there is no external froce along horizontal direction. Hence an answer.
(D) For A the normal force from ground is balanced by the impulsive force by B. Initial and final momentum is zero. Hence an answer.
