Question

please answer question

Answer 1

m1u1+m2u2=m1v1+m2v2 where m1=m2 and e=v2-v1 /u1-u2 where u1 =0.5 m/s and u2=-0.3m/s and e=1 (elastic collision) v1=-0.3m/s and v2=0.5m/s and iski trick bhi hai agar two body ka mass equal hai elastic collision hai toh velocity exchange ho jati hai with sign