A 5.0 kg object moving along a straight line trajectory with a speed of 4.0 m/s

Question

A 5.0 kg object moving along a straight line trajectory with a speed of 4.0 m/s collides head-on with a 10.0 kg object moving toward it along the same straight line with a speed of 3.0 m/s. The 10.0 kg object stops dead after the collision. Consider as positive the direction of motion of the 5.0 kg along the straight line object before the collision.

(A) What is the linear momentum of the 5.0 kg object before the collision?

(B) What is the linear momentum of the 10.0 kg object before the collision?

(C) What is the velocity of the 5.0 kg object after the collision?

Explanation / Answer

m1(v1-v2)+m2(v1-v2)=0 a. 5*4=20 b. 10*-3=-30 c. m1(v1-v2)+m2(v1-v2)=0 5(4-x)+10(-3+0)=0 20-5x-30=0 -5x=10 -2=x

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