Question

an object of mass 2 kg is placed at rest in a frame (S1) moving with velocity 10i+5j m/s and having acceleration 5i+10j m/s^2.This object is also seen by an observer standing in a frame (S2)moving with velocity 5i+10j m/s.
1).Calculate pseudo force acting on object.Which frame is responsible for this force.
2). Calculate net force acting on object with respect to S2 frame
3). Calculate net force acting on object with respect to S1 frame

Answer 1

Ok.. ll give you a hint

acceleration is ABSOLUTE.. not relative .. ergo.. force is ALSO ABSOLUTE.. so regardless of which frame you are in.. the force is the same..

hence 2) and 3) should have same answer!

Answer 2

no it's not correct they both hve different answer

Answer 3

ahh.. is the third one zero?!

Answer 4

yaa

Answer 5

ahh.. thats nonsense actually :P..

Answer 6

what?//

Answer 7

oh.. well.. maybe the context is such.. !!

Answer 8

oki fine.. lemme not confuse you then!!

Answer 9

imagine you are in frame 1..

you would see the box to be at rest right??

Answer 10

yaa

Answer 11

thus.. u see the net force to be zero!

Answer 12

but same should be the case with respect to s2 frame also

Answer 13

why!?

when u are in frame s2.. you see the box accelerating don't u!? .. cause frame 1 is accelerating.. !

Answer 14

okk...

Answer 15

then how to calculate that force w.r.t to s2 frame

Answer 16

force = mass times acceleration!

Answer 17

yaaa

Answer 18

but u cannot multiple a vector quantity with a scalar one

Answer 19

you can!..

Answer 20

then u want to say that the answer is 10i+20j N

Answer 21

bt wt about answer of part 1

Answer 22

its the same answer.. when u are in frame 1.. you feel that same pseudo force on yourself!

Answer 23

but.. opposite in direction

Answer 24

bt why is it that the magnitude is same

Answer 25

how can it be possible that it's magnitude is the same and direction is opposite to that of the force on object with respect to frame s2