Question

3.

Answer 1

http://prntscr.com/4boe68

Answer 2

@Abhisar

Answer 3

hav u tried it urself ?

Answer 4

what formula do I need to use

Answer 5

Based on the diagram, momentum is conserved

Answer 6

Potential energy of the spring is converted into kinetic energy

Answer 7

ok..

Answer 8

but there is no k given

Answer 9

I think energy of spring = total k.e of both the trolleys

Answer 10

yes

Answer 11

yes that's possible

Answer 12

and you can calculate v of trolley Q by applying conservation of momentum

Answer 13

yes !
4\(\times 1.5=3\times V\\ =>V=(4\times 1.5)/3\)

Answer 14

So, the formula is mu+mv=0

Answer 15

yes because initially both were at rest

Answer 16

v=2

Answer 17

yes....!
Now add the KEs of both blocks

Answer 18

10.5 J

Answer 19

Thank you @Abhisar and @Fifciol

Answer 20

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