Question

please help me and solve this physics problem dear ❤️​

Answer 1

Answer:

youanans is 4) 50 j now it is easy

Answer 2

Explanation:

momentum conservation : 1/2(2)(10)²-1/2(2)(20)²=1/2(4)(v)²

solve for v

then ∆KE = KEf-KEi

=1/2(v)²-{1/2(2)(10)²+1/2(2)(20)²}