Question

please answer I need urgently ​

Answer 1

Explanation:

see the attachment......

Answer 2

Explanation:

According to the question

100*35=M1 v1 + m2 v2

3500= 30*0+70* V

so,

3500=70 x V

°}V will be 3500/70

= 50 m/s.

Hope this helps you.