Ahall A is thrown up vertically with speed u. At the sameinstant anoth

1.	Ahall A is thrown up vertically with speed u. At the sameinstant another ball B is released from rest at a heighthvertically above the point of projection of A. Taking themoment of projection as t = 0 and acceleration due togravity is 'g', answer the following questions,21 At any time instant t, the magnitude of relativeacceleration of A with respect to B is(1) g(2) 2g(3) -2g(4) Zero22. At any time instant t, the speed of A relative to Bis(1) u(2) 4- 2gt(3) √u-2gt(4) u-gt23. The separation between the bodies at any timeinstant t is(1) h(2) h-ut(3) h-ut + gt²/2(4) h-ut + gt²
Answer» Answer: Acceleration of body A= -g (since, it is moving upward) Acceleration of body B= g (since, it is moving downward) Acceleration of A wrt B = acceleration of A- acceleration of B = -2g SPEED of A at any time t= u-gt Speed of B at any time t =gt speed of A wrt to B = speed of A -speed of B = u-2gt Height of A at any time t = UT- gt²/2 Height of B at any time t = h -ut Seperation between the BODIES= h-ut-ut-gt²/2 =h-2ut-gt²/2

Ahall A is thrown up vertically with speed u. At the sameinstant another ball B is released from rest at a heighthvertically above the point of projection of A. Taking themoment of projection as t = 0 and acceleration due togravity is 'g', answer the following questions,21 At any time instant t, the magnitude of relativeacceleration of A with respect to B is(1) g(2) 2g(3) -2g(4) Zero22. At any time instant t, the speed of A relative to Bis(1) u(2) 4- 2gt(3) √u-2gt(4) u-gt23. The separation between the bodies at any timeinstant t is(1) h(2) h-ut(3) h-ut + gt²/2(4) h-ut + gt²

Answer»

Answer:

Acceleration of body A= -g (since, it is moving upward)

Acceleration of body B= g (since, it is moving downward)

Acceleration of A wrt B = acceleration of A- acceleration of B

= -2g

SPEED of A at any time t= u-gt

Speed of B at any time t =gt

speed of A wrt to B = speed of A -speed of B = u-2gt

Height of A at any time t = UT- gt²/2

Height of B at any time t = h -ut

Seperation between the BODIES= h-ut-ut-gt²/2

=h-2ut-gt²/2