coin problem
I believe it should be c but key says a
Coin is in free fall so there's no pseudo force or anything ,only g in both the cases.
In case 2 the elevator is moving so essentially the distance travelled by coin in ground frame is reduced
11 Replies
@Gyro Gearloose
Note for OP
+solved @user1 @user2... to close the thread when your doubt is solved. Mention the users who helped you solve the doubt. This will be added to their stats.how is it only g in both cases ? In case 2 it can be considered that the left is moving with uniform acc a
let's say it take t1 to reach the floor when it is at rest
and t2 when it is moving with uniform acc
in this way the answer is gonna be c
due to pseudo force either lowering or increasing the effective acc downwards
but considering moving uniformly means uniform velocity there will be only g in both cases and no pseudo
and if there is no pseudo the eff acc remains g and the time taken in both cases comes out to be equal
option b that is
a can't be the answer in any case
Why can’t we consider it as uniform velocity?
i mean that's what i did in another case
^
yeah i got your point
in short if life is moving up there is initial accn of coin in upwards dirn and as soon as its dropped it get g downward therefore g-a
and vice versa for down
same goes for intitial velocity ig
yeah , i misread , got t1=t2
thanx
shall i close @stormycloud or due you have any doubts ?
yep but that is when lift is moving with acc a and direction isn't specified
no it doesn't
uniform vel means no net acc
g remains the only force this way taking same time to reach bottom of lift in both cases
i meant in other context
elaborate please
nvm that lol
+solved @Ishizora
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