Question

6.
а
Consider an atwood machine in an upward accelerating elevator. The eleavator starts from rest at
0. Mark the correct statements (MAQ)
[ ]
Given m = m = m
a) acceleration of both the blocks are same for an inertial observer
b) at any time, speed of both blocks same
c) at any time, speed of both blocks may be different

d) tension in string connecting blocks is mg during upward acceleration of elevator
​

Answer 1

Answer:

Let our frame of reference be elevator, a pseudo force will act downwards

Total tension force acting on mass m will be m(g+a) in upward direction as mass m is at rest wrt elevator i.e

T=m(g+a)

Displacement in upward direction during time t=1/2at

2

Work done by tension force = T×displacement

= m(g+a)×

2

1

at

2

=

2

m(g+a)at

2

I hope it helps