Please help with me the physics problems and show your works, thanks!! A rigid b

Question

Please help with me the physics problems and show your works, thanks!!

A rigid ball with mass 1.0kg initially travels with a velocity 12 [m/8] i. It strikes and bounces off of a block of mass 2.0kg which was initially at rest and hanging from a light rope of length 3.0m. After the collision, the ball travels at -6.0 [m/8]. Immediately after the ball strikes, what is the speed of the block? 3 m/8 6 m/8 *** 9 m/8 12 m/8 18 m/8 Immediately after the ball strikes, what is the tension in the rope? 20N 34N 54N *** 74N 96N

Explanation / Answer

7.

By Consevation of momentum

M1V1,i+M2V2,i=M1V1,f+M2V2,f

1*12i+2*0=1*(-6i)+2*V2,f

V2,f=18i m/s

|V2,f|=18 m/s

8.

Tension in the rope

T=mg=2*10

T=20 N

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