Question

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Answer 1

Answer:

(a) 100 kgm/s

(b) 6.67 m/s

Explanation:

m1= 5kg

m2=10kg

u1=20m/s

u2=0

v1=v2=v(say, because they stick)

(a) total momentum before impact

= m1u1+m2u2 = 5×20+10×0 = 100 kgm/s

(b) Usjng conservation of linear momentum,

m1u1+m2u2 = m1v1+m2v2

100 = (m1+m2)v

v=100÷(5+10) = 100÷15 = 6.67 m/s

Answer 2

hii how r u.

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