12) A 2.00-g bullet traveling at 700 m/s hits and becomes embedded in a stationa

Question

12) A 2.00-g bullet traveling at 700 m/s hits and becomes embedded in a stationary 5.00-kg wood block. What is the speed of the block immediately after the bullet has stopped moving relative to the block? 13) A 750-g mass traveling at 8.0 m/s undergoes a head-on elastic collision with a 50-g mass traveling toward it also at 8.0 m/s. What is the speed of the 50-g mass after the collision? 14) A 320-g air track cart traveling at 1.25 m/s collides elastically with a stationary 270-g cart. What is the speed of the 270-g cart after the collision?

Explanation / Answer

Q2.

V2 = [2*m1/(m1+m2)] *u1 - u2*(m1-m2)/(m1+m2)

So, V2 = [(2*.750)/0.800]*8 - (700/800)*8

= 8 m/s

Please post other two questions separately.

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